cool (hot metal) by plunging into cold water or other liquid; "quench steel"
reduce the degree of (luminescence or phosphorescence) in (excited molecules or a material) by adding a suitable substance
satisfy (thirst); "The cold water quenched his thirst"
electronics: suppress (sparking) when the current is cut off in an inductive circuit, or suppress (an oscillation or discharge) in a component or device
not sympathetic or disposed toward; "unsympathetic officialdom"; "people unsympathetic to the revolution"; "his dignity made him seem aloof and unsympathetic"
(of characters in literature or drama) tending to evoke antipathetic feelings; "all the characters were peculiarly unsympathetic"