waterproof
noun
Definitions
A substance or preparation for rendering cloth, leather, etc., impervious to water.
Cloth made waterproof, or any article made of such cloth, or of other waterproof material, as rubber; especially, an outer garment made of such material.
verb
Definitions
To make waterproof or water-resistant.
adjective
Definitions
Unaffected by water.
Made of or covered with material that doesn't allow water in.
Incapable of failing; unassailable.