wa·ter·proof /ˈwɔtɚ/
  防水材料(a.)防水的(vt.)使防水
  Wa·ter·proof a. Proof against penetration or permeation by water; impervious to water; as, a waterproof garment; a waterproof roof.
  Wa·ter·proof, n.
  1. A substance or preparation for rendering cloth, leather, etc., impervious to water.
  2. Cloth made waterproof, or any article made of such cloth, or of other waterproof material, as rubber; esp., an outer garment made of such material.
  Wa·ter·proof v. t. To render impervious to water, as cloth, leather, etc.
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  waterproof
       adj : not permitting the passage of water [syn: rainproof, waterproofed]
       n 1: any fabric impervious to water
       2: a water-resistant coat [syn: raincoat]
       v : make watertight; "Waterproof the coat"