"negative reply," c.1225, from O.E.
na (adv.) "never, no," from
ne "not, no" +
a "ever," from P.Gmc.
*ne (cf. O.N., O.Fris., O.H.G.
ne, Goth.
ni "not"), from PIE base
*ne- "no, not" (see
un-). Second element from PIE
*aiw- "vital force, life, long life, eternity" (see
aye (2)). As an adj. meaning "not any" (c.1200) it is reduced from O.E.
nan (see
none), the final
-n omitted first before consonants and then altogether.
No-no (n.) first attested 1942.
No problem as an interjection of assurance, first attested 1963. Phrase
no can do "it is not possible" is attested from 1914.