English Words: I

17,902 words · Page 21 of 359

infiltrateverb

To surreptitiously penetrate, enter or gain access to.

infiltrationnoun

The act or process of infiltrating, as of water into a porous substance, or of a fluid into the cells of an organ or part of the body.

infiltratornoun

One who infiltrates an organization or territory; an undercover or covert agent.

infiniteadj

Indefinably large, countlessly great; immense.

infinitelyadv

In an infinite manner; as of anything growing without bounds; endlessly.

infinitesimaladj

Incalculably, exceedingly, or immeasurably minute; vanishingly small.

infinitesimallyadv

In an infinitesimal manner.

infinitivenoun

The infinitive mood or mode (a grammatical mood).

infinitynoun

endlessness, unlimitedness, absence of a beginning, end or limits to size.

infirmadj

Weak or ill, not in good health.

infirmarynoun

A place where sick or injured people are cared for, especially a small hospital; sickhouse.

infirmitynoun

Feebleness, frailty or ailment, especially due to old age.

inflameverb

To set on fire; to kindle; to cause to burn, flame, or glow.

inflamedadj

Resulting from or affected by inflammation.

inflammableadj

Capable of burning.

inflammationnoun

The act of inflaming, kindling, or setting on fire.

inflammatoryadj

Tending to inflame or provoke somebody.

inflatableadj

Able to be inflated or blown up.

inflateverb

To enlarge an object by pushing air (or a gas) into it; to raise or expand abnormally

inflatedadj

Filled with air or fluid

inflationnoun

An act, instance of, or state of expansion or increase in size, especially by injection of a gas or liquid.

inflationaryadj

Causing or liable to cause inflation.

inflectedadj

Deviating from a straight line.

inflectionnoun

The linguistic phenomenon of morphological variation, whereby terms take a number of distinct forms in order to express different grammatical features.

inflectionaladj

Of or pertaining to inflection.

inflexibilitynoun

The quality or state of being inflexible, or not capable of being bent or changed; unyielding stiffness

inflexibleadj

Not flexible; not capable of bending or being bent.

inflictverb

To thrust upon; to impose.

inflictedverb

simple past and past participle of inflict

inflictionnoun

The act of inflicting or something inflicted; an imposition.

inflorescencenoun

A group or cluster of flowers arranged on a stem that is composed of a main branch or a system of branches.

inflownoun

The act or process of flowing in or into.

influencenoun

The power to affect, control or manipulate something or someone; the ability to change the development of fluctuating things such as conduct, thoughts or decisions.

influencedverb

simple past and past participle of influence

influencernoun

A person who or a thing which influences.

influencesnoun

plural of influence

influencingnoun

influence

influentialadj

Having or exerting influence.

influenzanoun

An acute contagious disease of the upper airways and lungs, caused by a virus, which rapidly spreads around the world in seasonal epidemics.

influxnoun

A flow inward or into something; a coming in.

infonoun

information.

infographicnoun

A visual representation of information.

infomercialnoun

A program-length television commercial, typically between thirty minutes and one hour long, that advertises a product or service by presenting supposedly impartial information about it.

informverb

To instruct, train (usually in matters of knowledge).

informaladj

Not formal or ceremonious.

informalitynoun

The condition of being informal.

informallyadv

In an irregular or informal manner; without the usual forms.

informantnoun

One who relays confidential information to someone, especially to the police; an informer.

informaticsnoun

Synonym of computer science.

informationnoun

Something that provides a definitive characterization or description of the nature and attributes of a specified entity.

Spelling & Dictionary Insight

The English alphabetical index for the letter I contains 17,902 headwords drawn from our Wiktionary-derived dictionary table. At 50 entries per page the browse splits into 359 pages, and you are currently viewing page 21. Every row above is a dictionary-backed entry with a canonical slug, and each links through to a full definition page with pronunciation, senses, etymology, and related-word data where available.

On this page 50 of 50 entries carry a part-of-speech tag and 50 carry at least one stored definition. Coverage varies across letters because Wiktionary volunteers build entries at different speeds for different parts of the alphabet, letters with common starting sounds (S, C, T, P) usually have the densest coverage, while less frequent starters (X, Q, Z) tend to have shorter but more specialised lists. PlainSpell surfaces whatever data is present and links back to the source when a definition is not yet recorded.

For readers using this index as a spelling reference, the guarantee is that every form you see on the list is a documented English headword, not a guess, not a derived inflection lacking a lemma row. If a word you expected to find is absent from the "I" list, it usually means the form exists only as an inflection of another lemma (e.g. a past participle stored under the infinitive) or the entry has not yet been imported from Wiktionary. Use the search bar or the misspelling lookup to resolve these cases.