unquenchable
adjectiveImpossible to slake or satisfy.
adjectiveImpossible to suppress or destroy.
Not quenchable; incapable of being quenched, extinguished, allayed, or the like: as, unquenchable fire, thirst, etc.
nounThat which cannot be quenched; figuratively, one whose zeal cannot be quenched.
adjectiveThat cannot be
impossible to quench