kibosh

Origin

The origin of the noun is uncertain; the following etymologies have been suggested: * According to Gerald Leonard Cohen, Stephen Goranson, and Matthew Little, at present the most likely derivation is as a non-rhotic variant of kurbash (“heavy whip, lash”), from Arabic كُرْبَاج (kurbāj, “lash, whip”), or from its etymon Ottoman Turkish قرباچ (kırbaç, “lash, whip”) (whence Turkish kırbaç (“whip”)). * From Irish caidhp bháis (literally “death cap”), said to denote, among other things, the black cap worn by English judges when pronouncing the death sentence, the hood put on a person before they were put to death by hanging, or a form of torture called pitchcapping.