adjective Made of or covered with material that doesn't allow water in; impervious to water and immune to its effects.
adjective Incapable of failing; unassailable.
adjective Not dependent on an aquatic environment to live; thus, able to live on dry land, or at least in a semiaquatic environment.
verb To make waterproof or water-resistant.
noun A substance or preparation for rendering cloth, leather, etc., impervious to water.
noun 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.