English Words: I
17,902 words · Page 42 of 359
A toxic spirocyclic sesquiterpenoids produced by various bracken ferns and by fungi of the phylum Basidiomycota.
A mathematical problem, asking whether a room with mirrored walls can always be illuminated by a single-point light source, allowing for repeated reflection of light off the mirrored walls. It was solved in 1958: there are such rooms that cannot be thus illuminated.
An Islamic philosophical and mystical school of thought introduced by Iranian philosopher Shihab al-Din Yahya ibn Habash Suhrawardi in the 12th century.
A member of any of various societies, sects or other people claiming religious or intellectual enlightenment.
Someone who subscribes to the doctrine of illuminism, or who claims to have achieved spiritual illumination; one of the Illuminati.
Subject to or pertaining to an illusion, often used in the sense of an unrealistic expectation or an unreachable goal or outcome.
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 42. 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.