unquenchable

verb (used with object)

1. to slake, satisfy, or allay (thirst, desires, passion, etc.).
2. to put out or extinguish (fire, flames, etc.).
3. to cool suddenly by plunging into a liquid, as in tempering steel by immersion in water.
4. to subdue or destroy; overcome; quell: to quench an uprising.
5. Electronics. to terminate (the flow of electrons in a vacuum tube) by application of a voltage.

verb (tr)

1. to satisfy (one’s thirst, desires, etc); slake
2. to put out (a fire, flame, etc); extinguish
3. to put down or quell; suppressto quench a rebellion
4. to cool (hot metal) by plunging it into cold water
5. physics to reduce the degree of (luminescence or phosphorescence) in (excited molecules or a material) by adding a suitable substance
6. electronics
   1. to suppress (sparking) when the current is cut off in an inductive circuit
   2. to suppress (an oscillation or discharge) in a component or device

adj.late 14c., of fire; 1560s, of thirst, from un- (1) “not” + quench + -able. Related: Unquenchably. v.Old English acwencan “to quench” (of fire, light), from Proto-Germanic *cwandjan, probably a causative form of root of Old English cwincan “to go out, be extinguished,” Old Frisian kwinka. Related: Quenched; quenching.