"quenching" in the noun sense
1. extinction, extinguishing, quenching
the act of extinguishing causing to stop burning
"the extinction of the lights"
"quenching" in the verb sense
1. quench, slake, allay, assuage
"The cold water quenched his thirst"
2. snuff out, blow out, extinguish, quench
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"
"snuff out the candles"
electronics: suppress (sparking) when the current is cut off in an inductive circuit, or suppress (an oscillation or discharge) in a component or device
4. squelch, quell, quench
suppress or crush completely
"squelch any sign of dissent"
"quench a rebellion"
reduce the degree of (luminescence or phosphorescence) in (excited molecules or a material) by adding a suitable substance
cool (hot metal) by plunging into cold water or other liquid
Source: WordNet® (An amazing lexical database of English)
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