[v] cool by plunging into cold water; "quench metal"
[v] physics: reduce the degree of (luminescence or phosphorescence) in (excited molecules or a material) by adding a suitable substance
[v] suppress or crush completely; "squelch any sign of dissent"; "quench a rebellion"
[v] satisfy (thirst); "The cold water quenched his thirst"
[v] electronics: suppress (sparking) when the current is cut off in an inductive circuit, or suppress (an oscillation or discharge) in a component or device
[v] put out, as of fires, flames, or lights; "Too big to be extinguished at once, the forest fires at best could be contained"; "quench the flames"