Meaning

verb satisfy (thirst)

verb put out, as of fires, flames, or lights

verb electronics: suppress (sparking) when the current is cut off in an inductive circuit, or suppress (an oscillation or discharge) in a component or device

originFrom Middle English quenchen, from Old English cwenċan, from Proto-Germanic *kwankijaną.

Etymology from Wiktionary, CC BY-SA 3.0