Yes, quench is playable
...and is worth 22 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Quench" Definition
noun
The abnormal termination of operation of a superconducting magnet, occurring when part of the superconducting coil enters the normal (resistive) state.
The act of quenching or extinguishing; also, the state of being extinguished.
A pit or cavity in which water can be thrown upon hot coke just manufactured in an oven, so as to cool it and leach out the soluble sulphur elements.
verb-transitive
To cool (hot metal) by thrusting into water or other liquid.
To put an end to; destroy.
To put out (a fire, for example); extinguish.
To slake; satisfy: Mineral water quenched our thirst.
To suppress; squelch: The disapproval of my colleagues quenched my enthusiasm for the plan.
verb
To satisfy, especially an actual or figurative thirst.
To extinguish or put out (as a fire or light.).
To cool rapidly by dipping into a bath of coolant, as a blacksmith quenching hot iron.
Suppress or crush completely.
Cool (hot metal) by plunging into cold water or other liquid.
verb-intransitive
To become extinguished; to go out; to become calm or cool.
To extinguish or put out, as fire.
To extinguish or allay; stop; put an end to, as thirst.
To relieve the thirst of.
To suppress; stifle; check; repress; destroy: as, to quench a passion or emotion.
To lay or place in water, as a heated iron. See temper.
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