étanche

Definition: (adj) waterproof, watertight

Votre montre est-elle étanche ? - Is your watch waterproof?

C'est un compartiment étanche - It's a watertight compartment

Related: étancher - to staunch, stem, dam, dry, stop up, make watertight; étanchéité (f noun) - watertightness

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Pronunciation: [ay ta(n)sh]Audio Link