"mental capacity," O.E.
wit, more commonly
gewit, from P.Gmc.
*witjan (cf. O.S.
wit, O.N.
vit, Dan.
vid, Swed.
vett, O.Fris.
wit, O.H.G.
wizzi "knowledge, understanding, intelligence, mind," Ger.
Witz "wit, witticism, joke," Goth.
unwiti "ignorance"), from PIE
*woid-/*weid-/*wid- "to see," metaphorically "to know" (see
vision). Related to O.E.
witan "to know" (source of
wit (v.)). Meaning "ability to make clever remarks in an amusing way" is first recorded 1542; that of "person of wit or learning" is from c.1470.
Witticism coined 1677, by Dryden. For nuances of usage, see
humor.
"A witty saying proves nothing." [Voltaire, Diner du Comte de Boulainvilliers]