verb/e.tɑ̃.ʃe/
to make watertight, to stop water from flowing; to quench (thirst); to satiate, to quench, to assuage
“A la fontaine je m'abreuve, j'étanche ma soif.” — From the fountain I drink, I quench my thirst.
Inherited from Old French estanchier, of uncertain origin: possibly from a Vulgar Latin *stanticāre < *stanticus < Latin stantem. Compare Italian stanco, stancare, Spanish estancar.