English Words: I

17,902 words · Page 128 of 359

indefatigableadj

Extremely persistent and untiring.

indefatigablenessnoun

The state of being indefatigable.

indefatigablyadv

In an extremely persistent and untiring manner; in an indefatigable manner

indefatigationnoun

The quality of being indefatigable; tirelessness.

indefeasibilitynoun

The state or quality of being indefeasible, of being incapable of being defeated

indefeasibleadj

Not liable to being annulled or declared void.

indefeasiblenessnoun

The quality of being indefeasible.

indefeasiblyadv

In an indefeasible manner.

indefectibilitynoun

The quality of being indefectible.

indefectibleadj

Having the ability to resist defect or failure, permanent, lasting.

indefectiblyadv

In an indefectible manner.

indefectiveadj

Not defective; perfect; complete.

indefensibilitynoun

The quality or state of not being defensible.

indefensibleadj

Not defensible; not capable of being defended.

indefensiblenessnoun

The quality or state of not being defensible.

indefensiblyadv

In an indefensible manner.

indefensiveadj

Not defensive; unprotected.

indefensivelyadv

In a manner that is indefensive.

indeffedadj

Used to describe a user, account, or IP address that is indefinitely blocked or banned from editing or other actions.

indeficiencynoun

The state or quality of not being deficient; sufficiency

indeficientadj

Not deficient; full or sufficient.

indefinableadj

That which cannot be precisely defined or put into words.

indefinablenessnoun

The state of being indefinable.

indefinablyadv

In an indefinable manner

indefiniteadj

Without limit; forever, or until further notice; not definite.

indefinite articlenoun

A word preceding a noun to indicate that the noun refers to any member of the class of objects named by the noun.

indefinitelyadv

In a manner that is not definite.

indefinitenessnoun

The characteristic of being indefinite.

indefinitiveadj

Not definitive.

indefinitivenessnoun

The state or condition of being indefinitive.

indefinitizeverb

To make indefinite.

indefinitudenoun

The quality of being indefinite or vague.

indefinitynoun

The quality of being vague and poorly defined.

indeflectibleadj

Alternative form of undeflectable.

indeformableadj

Synonym of undeformable

indegreenoun

The number of edges directed into a vertex in a directed graph

indehiscentadj

Not dehiscing when mature; not dehiscent.

indelnoun

Either an insertion or deletion mutation in the genetic code.

indelebleadj

Obsolete form of indelible.

indelectableadj

Not delectable; unpleasant; disagreeable.

indeliberateadj

Done without deliberation or forethought; unpremeditated

indeliberatelyadv

In an indeliberate manner.

indeliberatenessnoun

Quality of being indeliberate.

indelibilitynoun

The property of being indelible.

indelibleadj

Having the quality of being difficult to delete, remove, wash away, blot out, or efface.

indeliblenessnoun

Quality of being indelible.

indeliblyadv

In an indelible manner.

indelicacynoun

The condition of being indelicate.

indelicateadj

Improper or immodest.

indelicatelyadv

In an indelicate manner.

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 128. 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.