| i.e. (abbreviation, acronym) id est (i.e.) that is to say (Latin); for example; for instance | I.O.U. (abbreviation, acronym) I owe you (IOU) signed note acknowledging a debt |
| I.P.O. (abbreviation, acronym) Initial Public Offering (IPO) first offering to the public of a company's shares on the stock market | idea (noun) form plural: ideas concept; thought; opinion; intention; plan |
| ideal (adjective) perfect; imaginary; excellent; best; exemplary | ideal (noun) form plural: ideals standard of perfection; pattern; model; person or thing that embodies a standard of perfection |
| idealize (verb) forms: idealized; idealized; idealizing to represent as the embodiment of perfection | identification (noun) form plural: identifications verification of a person or thing; recognition |
| identify (verb) forms: identified; identified; identifying to recognize; to show to be the same; to sympathize; to relate | idle (adjective) lazy; vain; unoccupied; unemployed |
| idle (verb) forms: idled; idled; idling to lounge; to do nothing; to laze around | ignorance (noun) form: no plural lack of knowledge; illiteracy; lack of education; state of being uninformed |
| ignore (verb) forms: ignored; ignored; ignoring to disregard; to overlook; to refuse to recognize; to reject | ill (adjective) sick; bad; unfriendly; unsatisfactory; inadequate; inferior |
| ill (adverb) with difficulty; barely; scarcely; poorly; improperly | ill (noun) form plural: ills trouble; misfortune; evil; harm; disease; sickness |
| illustrate (verb) forms: illustrated; illustrated; illustrating to exemplify; to clarify; to explain; to depict; to elucidate | illustration (noun) form plural: illustrations picture in a book or other work; explanation; clarification |
| image (noun) form plural: images figure; form; reflection; picture; likeness; embodiment | image (verb) forms: imaged; imaged; imaging to draw a likeness; to describe; to reflect; to picture in the mind |
| imaginary (adjective) not real; fanciful | imagination (noun) form plural: imaginations ability of the mind to create mental pictures which do not exist in reality |
| imagine (verb) forms: imagined; imagined; imagining to envision; to fantasize; to visualize; to think; to assume | imaging (noun) form: no plural forming of mental pictures to control bodily processes |
| imagining (noun) form plural: imaginings fantasizing; visualizing | immediate (adjective) instantaneous; prompt; direct; close |
| immediately (adjective) right away; shortly; at once; without delay | immediately (conjunction) as soon as |
| impact (noun) form plural: impacts influence; effect; colliding of two bodies; touch | impact (verb) forms: impacted; impacted; impacting to influence; to affect strongly; to collide; to squeeze in |
| impatient (adjective) unable to wait; intolerant; restless | impede (verb) forms: impeded; impeded; impeding to delay; to obstruct; to hinder; to prevent; to thwart |
| imperative (adjective) necessary; obligatory; commanding | imperative (noun) form plural: imperatives necessity; obligation; command; order |
| implement (noun) form plural: implements tool; instrument; piece of equipment | implement (verb) forms: implemented; implemented; implementing to perform; to put into effect; to carry out; to execute; to realize |
| implementation (noun) form plural: implementations realization; carrying out; performing; putting into effect; execution | implication (noun) form plural: implications consequence; outcome; result; indirect suggestion; connotation; hint |
| imply (verb) forms: implied; implied; implying to suggest indirectly; to hint; to infer; to mean; to import | import (noun) form plural: imports brining in of goods from another country; opposite of export; meaning; significance |
| import (verb) forms: imported; imported; importing to bring from another place; to bring goods from a foreign country; to signify; to imply | important (adjective) significant; influential; essential; crucial; critical |
| impose (verb) forms: imposed; imposed; imposing to require; to compel; to force upon; to enforce; to institute | impossible (adjective) unbearable; cannot be done; cannot be endured |
| impress (verb) forms: impressed; impressed; impressing to affect strongly; to emphasize; to stamp | impression (noun) form plural: impressions strong feeling or idea left by an experience; effect; vague memory |
| impressive (adjective) grand; magnificent; striking | improve (verb) forms: improved; improved; improving to make better; to increase in quality; to enhance; to develop |
| improvement (noun) form plural: improvements something which enhances or improves; addition or change which adds value to something | impulse (noun) form plural: impulses instinctual urge; sudden desire; whim; wave of energy sent via a nerve |
| inalienable (adjective) non-transferable | inanimate (adjective) lifeless; spiritless |
| inbound (adjective) traveling in an inward direction | Inc. (abbreviation, acronym) incorporated legally established as a corporation |
| incentive (adjective) provocative; stimulating; encouraging | incentive (noun) form plural: incentives stimulus; inducement; enticement; encouragement |
| incinerator (noun) form plural: incinerators furnace which burns things to ashes | incline (noun) form plural: inclines slope; grade; slant |
| incline (verb) forms: inclined; inclined; inclining to slope; to bend; to bow; to slant; to influence | include (verb) forms: included; included; including to comprise; to contain; to embrace |
| including (adjective) comprising; containing; embracing | inclusive (adjective) containing; comprehensive; all-embracing; extensive; taking in |
| income (noun) form plural: incomes amount of money received in payment for goods or services or from other sources; revenue; profits | inconvenience (noun) form plural: inconveniences bother; disturbance; nuisance; discomfort |
| inconvenience (verb) forms: inconvenienced; inconvenienced; inconveniencing to cause discomfort; to trouble; to put out; to disturb | incorrect (adjective) wrong; erroneous; imprecise; unseemly; improper |
| increase (noun) form plural: increases growth; expansion; addition; enlargement; escalation | increase (verb) forms: increased; increased; increasing to enlarge; to add to; to multiply; to raise; to intensify |
| incredible (adjective) unbelievable; inconceivable; fabulous; great; amazing | incumbent (adjective) presently holding an office or position; compulsory; necessary; resting; lying |
| incumbent (noun) form plural: incumbents person who currently holds an office or position | incur (verb) forms: incurred; incurred; incurring to meet with; to bring upon oneself; to acquire |
| independent (adjective) free; autonomous; sovereign; self-reliant; self-sufficient | independent (noun) form plural: independents person who does not belong to any political party |
| index (noun) form plural: indexes list of subjects or other information arranged in alphabetical order; indicator; sign | index (verb) forms: indexed; indexed; indexing to register; to adjust prices or salaries in accordance with changes in economic indicators |
| indicate (verb) forms: indicated; indicated; indicating to show; to point out; to mark; to signify; to imply; to exhibit | indoor (adjective) occurring within a building; meant to be used inside |
| induce (verb) forms: induced; induced; inducing to cause; to bring about; to set in motion; to influence | indulge (verb) forms: indulged; indulged; indulging to give in to desire; to yield to; to satisfy; to spoil; to humor |
| indulgence (noun) form plural: indulgences act of giving in to desire; something which gratifies; luxury; leniency | industrialize (verb) forms: industrialized; industrialized; industrializing to innovate and develop production |
| industry (noun) form plural: industries manufacturing; trade; diligence; perseverance; tendency to work hard | infancy (noun) form plural: infancies beginning phase of a project; babyhood |
| infant (adjective) pertaining to a minor | infant (noun) form plural: infants baby; very young child; toddler; tot; minor |
| infer (verb) forms: inferred; inferred; inferring to derive; to conclude; to guess; to surmise; to hint | inference (noun) form plural: inferences act of deriving; speculation; drawing of a conclusion |
| inflation (noun) form plural: inflations increase in the supply of money in relation to the amount of goods available resulting in a rise in prices | inflict (verb) forms: inflicted; inflicted; inflicting to impose; to cause something unpleasant |
| influence (noun) form plural: influences effect; impact; person or thing which has power to affect others | influence (verb) forms: influenced; influenced; influencing to affect; to impact; to impel; to control |
| influx (noun) form plural: influxes inflow; inward flow; place where a stream flows into another body of water | inform (verb) forms: informed; informed; informing to communicate data to; to tell; to brief; to notify |
| informal (adjective) unofficial; relaxed; casual; easy; laid-back | information (noun) form: no plural knowledge; intelligence; data |
| ingredient (noun) form plural: ingredients component; element; factor; one of the substances which comprises a mixture | inhabit (verb) forms: inhabited; inhabited; inhabiting to occupy; to live in; to dwell in; to reside in; to populate |
| inhabitant (noun) form plural: inhabitants person who lives in a particular place; resident; tenant; occupant | inherent (adjective) intrinsic; existing as a natural and integral part; natural; inborn |
| initial (noun) form plural: initials beginning letter of a person's first name; first letter (as of a word) | initial (verb) forms: initialed; initialed; initialing to sign using the first letter or letters of a name |
| initialed (adjective) signed with initials; marked with the first letter or letter of a name | initially (adverb) at first; in the first place; at the beginning |
| initiate (verb) forms: initiated; initiated; initiating to set going; to launch; to begin; to start | initiative (adjective) beginning; introductory |
| initiative (noun) form plural: initiatives enterprise; drive; ambition; beginning move in a process; first step | injure (verb) forms: injured; injured; injuring to hurt; to wound; to insult; to offend; to damage |
| injured (adjective) hurt; wounded; insulted; offended; damaged | injury (noun) form plural: injuries hurt; wound; harm; damage; insult |
| innocent (adjective) not guilty; pure; simple; naive; unsophisticated; harmless | innocent (noun) form plural: innocents person who is free from sin or wrongdoing |
| innovate (verb) forms: innovated; innovated; innovating to make changes; to create something new; to invent | innovation (noun) form plural: innovations introduction of something new; change; new method or practice |
| innovator (noun) form plural: innovators person who makes changes; person who introduces new methods or procedures; creative person | inquiry (noun) form plural: inquiries formal question; exploration; questioning; investigation |
| insert (noun) form plural: inserts something created separately for the purpose of being added to or placed inside (a book, newspaper, etc.) | insert (verb) forms: inserted; inserted; inserting to place in; to put in; to add to |
| insist (verb) forms: insisted; insisted; insisting to demand; to emphasize firmly; to request firmly; to require; to persevere | inspect (verb) forms: inspected; inspect; inspecting to check; to look over carefully and critically; to examine officially; to review |
| inspection (noun) form plural: inspections act of looking over carefully and critically; official examination; audit; review | inspector (noun) form plural: inspectors person whose job it is to supervise and examine; police officer ranking below a superintendent |
| inspiration (noun) form plural: inspiration stimulus; motivation; revelation; insight; idea | inspire (verb) forms: inspired; inspired; inspiring to motivate; to stimulate; to provoke; to influence; to encourage |
| inspiring (adjective) motivating; stimulating; encouraging; provoking; inhaling | install (verb) forms: installed; installed; installing to set up for use; to put in (i.e. machinery); to establish in an office or position |
| instalment (noun) form plural: instalments one of several separate payments into which a debt has been divided | instance (noun) form plural: instances occurrence; occasion; example; illustration |
| instance (verb) forms: instanced; instanced; instancing to refer to a case or occurrence to explain or prove a point; to cite; to mention | instant (adjective) immediate; quick; urgent; pressing; present; current |
| instant (noun) form plural: instants moment; very short space of time; current month | instantaneously (adverb) immediately; momentarily |
| instead (adverb) in place of; as a replacement | instinctively (adverb) naturally; spontaneously; intuitively; automatically |
| institute (noun) form plural: institutes foundation; organization which provides a certain service or supports a particular cause | institute (verb) forms: instituted; instituted; instituting to establish; to set up; to begin; to initiate; to start |
| institution (noun) form plural: institutions organization; custom; convention; law or activity which is accepted in a society | instruct (verb) forms: instructed; instructed; instructing to inform; to direct; to guide; to command; to order; to educate |
| instruction (noun) form plural: instructions teaching; direction; guidance; training; education; information | instructor (noun) form plural: instructors educator; teacher; trainer |
| instrument (noun) form plural: instruments tool; implement; device; appliance; agent; means | instrument (verb) forms: instrumented; instrumented; instrumenting to equip with devices for measuring, recording, or controlling |
| insulate (verb) forms: insulated; insulated; insulating to separate from others; to segregate | insult (noun) form plural: insults affront; offense; rude remark or action |
| insult (verb) forms: insulted; insulted; insulting to speak or act in a rude or contemptuous manner; to offend; to affront | insurance (noun) form plural: insurance contract by which property or persons are guaranteed against damage or loss |
| insure (verb) forms: insured; insured; insuring to provide a guarantee against possible damage or loss; to make certain | integrity (noun) form plural: no plural honesty; uprightness; morality; wholeness; unity |
| intelligence (noun) form plural: no plural ability to reason and understand; cleverness; brilliance; information | intend (verb) forms: intended; intended; intending to plan; to mean; to have in mind do or accomplish; to designate for a particular purpose |
| intense (adjective) extreme; great; powerful; strong; profound | intensify (verb) forms: intensified; intensified; intensifying to increase; to strengthen; to heighten |
| intensity (noun) form plural: intensities strength; energy; extreme degree; depth; clarity | intensive (adjective) characterized by a high degree; highly concentrated |
| intent (adjective) concentrated; focused; determined; resolute; purposeful | intent (noun) form plural: intents plan; goal; aim; objective; meaning |
| intention (noun) form plural: intentions plan; aim; goal; purpose | interchangeable (adjective) can be traded; can be substituted by something else |
| interest (noun) form plural: interests concern; affair; percentage on a loan which is paid over time | interest (verb) forms: interested; interested; interesting to cause to become involved in; to arouse curiosity |
| interfere (verb) forms: interfered; interfered; interfering to impede; to obstruct; to hinder; to meddle | interim (adjective) temporary; provisional |
| interim (adverb) meanwhile; in the meantime | interim (noun) form plural: interims temporary arrangement; in between period |
| interior (adjective) inner; inside; inland; of a country's domestic affairs; of an individual's inner life | interior (noun) form plural: interiors inside a building; inland section of a country |
| interject (verb) forms plural: interjected; interjected; interjecting to place between other things; to throw into the center of | intermittent (adjective) not continuous; sporadic; fitful; alternately stopping and starting |
| internal (adjective) inner; inside; located within; of a country's domestic affairs | internal (noun) form plural: internals inner quality; intrinsic characteristic |
| international (adjective) between countries; of relations between two or more countries | internationalize (verb) forms: internationalized; internationalized; internationalizing to globalize; to make worldwide |
| interpret (verb) forms: interpreted; interpreted; interpreting to explain; to clarify; to elucidate; to understand or explain in a particular way | interpreter (noun) form plural: interpreters person who translates from one language to another (orally); person how clarifies; commentator |
| interrupt (verb) forms: interrupted; interrupted; interrupting to stop; to discontinue; to disturb; to bring a conversation to a halt | interruption (noun) form plural: interruptions disturbance; discontinuance; stoppage; cutting-off |
| interview (noun) form plural: interviews meeting at which a person is evaluated through questioning (as for a job) | interview (verb) forms: interviewed; interviewed; interviewing to question formally; to evaluate through questioning |
| interviewee (noun) form plural: interviewees person who is being asked questions; job candidate | interviewer (noun) form plural: interviewers person who ask questions (i.e. reporter or employer) |
| intricate (adjective) complex; complicated; involved; entangled | introduce (verb) forms: introduced; introduced; introducing to present for the first time; to initiate; to establish; to announce |
| introduction (noun) form plural: introductions act of acquainting one person with another; preface | introductory (adjective) preliminary; beginning |
| invent (verb) forms: invented; invented; inventing to originate; to create; to design; to fabricate; to concoct | invention (noun) form plural: inventions creativity; resourcefulness; fabrication; falsehood |
| inventive (adjective) creative; new; original | inventor (noun) form plural: inventors creator; designer |
| inventory (noun) form plural: inventories stock; list of assets; act of checking stock | inventory (verb) forms: inventoried; inventoried; inventorying to make a detailed list of property; to summarize; to sum up the worth of |
| invest (verb) forms: invested; invested; investing to expend money or effort for future benefits; to grant; to install; to cover; to authorize | investment (noun) form plural: investments expenditure of money or effort for future benefits; authorization |
| investor (noun) form plural: investors person who puts money into a project | invisible (adjective) impossible to see; imperceptible; hidden; concealed |
| invitation (noun) form plural: invitations request for one's presence; summons; call | invite (verb) forms: invited; invited; inviting to request the presence of; to solicit; to attract; to encourage; to promote |
| invoice (noun) form plural: invoices bill | invoice (verb) forms: invoiced; invoiced; invoicing to bill; to charge |
| involve (verb) forms: involved; involved; involving to cause to be concerned with; to engage; to engross | involvement (noun) form plural: involvements inclusion; participation; connection; association; relation |
| irrelevant (adjective) beside the point; unconnected; impertinent; immaterial | irritate (verb) forms: irritated; irritated; irritating to annoy; to bother; to aggravate; to anger |
| irritated (adjective) annoyed; aggravated; exasperated | irritation (noun) form plural: irritations something which annoys or aggravates |
| issue (noun) form plural: issues topic; subject; matter; question; problem; publication | issue (verb) forms: issued; issued; issuing to publish; to distribute; to circulate; to emit |
| item (noun) form plural: items thing; object; article; news story; piece of information | itemize (verb) forms: itemized; itemized; itemizing to catalog; to list; to enumerate; to set down in full detail |
| itinerary (noun) form plural: itineraries route; travel plans; travel journal |