English Words: U

23,789 words · Page 116 of 476

undeclinableadj

Synonym of indeclinable.

undeclinablyadv

Synonym of indeclinably

Not varied by declension.

Not declining.

Not decocted.

That cannot be decoded.

Not decoded.

Not decohered

undecolic acidnoun

An acid, C₁₁H₁₈O₂, of the propiolic acid series, obtained indirectly from undecylenic acid.

undecolonizedadj

Not decolonized.

undecomposabilitynoun

The state or condition of being undecomposable.

undecomposableadj

Unable to be decomposed.

undecomposedadj

Not decomposed.

undecompoundedadj

Not decompounded.

undeconstructableadj

Not deconstructable.

undeconstructedadj

Not deconstructed.

undeconstructibleadj

Alternative form of undeconstructable.

undeconvolvedadj

Not deconvolved.

Not decorable.

undecoratableadj

Not decoratable.

To remove the decorations from.

Without decoration or adornment

undecorativeadj

Not decorative.

Not decorous.

undecorousnessnoun

Alternative form of indecorousness.

undecorticatedadj

Not decorticated.

Not decoyed.

Not decreased.

undecreasingadj

Not decreasing; growing no smaller.

To annul or revoke (an earlier decree).

Not decreed.

undecrementedadj

That has not been decremented.

Not decried.

undecryptableadj

That cannot be decrypted.

Not decrypted.

Any univalent radical derived from an undecane

Any salt or ester of undecylic acid.

undecylenatenoun

Any salt or ester of undecylenic acid.

Related to, derived from, or containing undecyl.

Any aliphatic hydrocarbon having a chain of eleven carbon atoms and containing one triple bond.

To undo the dedication or earmarking of.

Not dedicated.

Not deduced.

Not deducible.

Not deducted.

Not deductive.

Alternative form of undé.

Not transferred by deed.

Not deemed.

Not deep; shallow.

Spelling & Dictionary Insight

The English alphabetical index for the letter U contains 23,789 headwords drawn from our Wiktionary-derived dictionary table. At 50 entries per page the browse splits into 476 pages, and you are currently viewing page 116. 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 "U" 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.