I. ˈnā adverb
Etymology: Middle English, from Old Norse nei, from ne not + ei ever — more at no , aye
Date: 13th century
: no
II. noun
Date: 14th century
1. : denial , refusal
2.
a. : a negative reply or vote
b. : one who votes no
III. conjunction
Date: 1560
: not merely this but also : not only so but
the letter made him happy, nay , ecstatic