Adjective:

ठंडा न होनेवाला, न बुझनेवाला, अतृप्त,

unquenchable's Usage Examples:

More sympathetic judgments will divine unquenchable vitality in a faith whose very paradoxes rise up in new power again and again.

burn up the chaff with unquenchable fire.

Ariana gets dissed by Gabby from the flag corps, but the Spartans' unquenchable spirit still lets them perform "the perfect cheer" just one last time.

We hear his waining of " the coming wrath ": his mighty Successor will baptize with fire; the fruitless tree will be cast into the fire; the chaff will be separated from the wheat and burned with unquenchable fire; the claim to be children of Abraham will not avail, for God can raise up other children to Abraham, if it be from the stones of the desert.

Aquarius signs have an unquenchable thirst for knowledge.

But the spirit of the evangelists was unquenchable.

He heard the unquenchable life in a dying woman.

Synonyms:

quenchless, insatiable, insatiate, unsatiable,

Antonyms:

engorge, gormandise, eat, glut, satiate,