Neither

[nee-th er, nahy-] /ˈni ðər, ˈnaɪ-/

conjunction
1.
not either, as of persons or things specified (usually followed by nor):
Neither John nor Betty is at home.
2.
nor; nor yet; no more:
Bob can’t go, and neither can I. If she doesn’t want it, neither do I.
adjective
3.
not either; not the one or the other:
Neither statement is true.
pronoun
4.
not either; not one person or the other; not one thing or the other:
Neither of the suggestions will do. Neither is to be trusted.
/ˈnaɪðə; ˈniːðə/
determiner
1.

conjunction
2.
(coordinating)

adverb
3.
(sentence modifier) (not standard) another word for either (sense 4)
conj.

Old English nawþer, contraction of nahwæþer, literally “not of two,” from na “no” (see no) + hwæþer “which of two” (see whether). Spelling altered c.1200 by association with either. Paired with nor from c.1300; earlier with ne. Also used in Old English as a pronoun. As an adjective, mid-14c.