History of the word "Fairy"

The word fairy derives from Middle English faierie (also fayerye, feirie, fairie), a direct borrowing from Old French faerie (Modern French féerie) meaning the land, realm, or characteristic activity (i.e. enchantment) of the legendary people of folklore and romance called (in Old French) faie or fee (Modern French fée). This derived ultimately from Late Latin fata (one of the personified Fates, hence a guardian or tutelary spirit, hence a spirit in general); cf. Italian fata, Portuguese fada, Spanish hada of the same origin.

Fata, although it became a feminine noun in the Romance languages, was originally the neuter plural ("the Fates") of fatum, past participle of the verb fari to speak, hence "thing spoken, decision, decree" or "prophetic declaration, prediction", hence "destiny, fate". It was used as the equivalent of the Greek Μοῖραι Moirai, the personified Fates who determined the course and ending of human life.

To the word faie was added the suffix -erie (Modern English -(e)ry), used to express either a place where something is found (fishery, heronry, nunnery) or a trade or typical activity engaged in by a person (cookery, midwifery, thievery). In later usage it generally applied to any kind of quality or activity associated with a particular sort of person, as in English knavery, roguery, witchery, wizardry.

Faie became Modern English fay "a fairy"; the word is, however, rarely used, although it is well known as part of the name of the legendary sorceress Morgan le Fay of Arthurian legend. Faierie became fairy, but with that spelling now almost exclusively referring to one of the legendary people, with the same meaning as fay. In the sense "land where fairies dwell", the distinctive and archaic spellings Faery and Faerie are often used. Faery is also used in the sense of "a fairy", and the back-formation fae, as an equivalent or substitute for fay is now sometimes seen.