Etymology
1. 1523, from M.Du.
wagen, waghen, from P.Gmc.
*wagnaz (cf. O.E.
wægn, Mod.Eng.
wain, O.S., O.H.G.
wagan, O.N.
vagn, O.Fris.
wein, Ger.
Wagen), from PIE
*woghnos, from
*wegh- "to carry, to move" (cf. Skt.
vahanam "vessel, ship," Gk.
okhos, L.
vehiculum, O.C.S.
vozu "carriage, chariot," Rus.
povozka, Lith.
vazis "a small sledge," O.Ir.
fen, Welsh
gwain "carriage, cart;" see weigh). In Du. and Ger., the general word for "a wheel vehicle;" Eng. use is a result of contact through Flemish immigration, Dutch trade, or the Continental wars. It has largely displaced the native cognate, wain. Spelling preference varied randomly between
-g- and
-gg- from mid-18c., before Amer.Eng. settled on the etymological
wagon, while
waggon remained common in Great Britain.
Wagon train is attested from 1810. Phrase
on the wagon "abstaining from alcohol" is 1904, originally
on the water cart.
2. Borrowed from Middle Dutch wagen, from Old Dutch *wagan, from Proto-West Germanic *wagn, from Proto-Germanic *wagnaz (“wagon”), from Proto-Indo-European *weǵʰ- (“to transport”). Generally displaced native cognate wain, from Old English wæġn, of which it is a doublet. Related also to way, weigh.
3. Sense 8 (“woman of loose morals; obnoxious woman”) is probably a derogatory and jocular reference to a woman being “ridden”, that is, mounted for the purpose of sexual intercourse.
4. The verb is derived from the noun. See: Middle Dutch '
wagen'.