Comm. Teut.: OE. cwicu, c(w)ucu and cwic, c(w)uc-, = OFris. quik, quek (mod.Fris. quick, queck), OS. quik (MDutch quic, Dutch kwik), OHG. quec, quecch- and chec, checch- (MHG. quec, queck- and kec, keck-, G. keck lively, pert, bold; also dial. queck, quick), ONor. kvik-r, kvikv- and kyk-r, kykv- (MSw. qvik, qvek, Sw. qvick; Da. kvik, also kvæg sb., ‘cattle’, and kvæg-, kvik- in combs. as kvæg- or kviksand):-OTeut. *kwikwo-z.
The origin of the second k is obscure; it is absent in the Gothic *qius (in pl. qiwai):-*kwiwo-z, from the common Aryan *gwī̆wo- which appears in Skr. jīvá, L. vīvus (f…