the world > existence and causation > existence > non-existence > [noun] > none or not any one of > neither (4)
= neither, adv. 1. rare after 16th cent. (now English regional).
Not one (of two or more persons or things). Also †neither nouther.
Followed by ne, na, no, or nor (in early use frequently with another preceding or following negative): = neither, adv. 1.
Standing alone or with of. With singular or unmarked agreement.