also water-proof, 1725, from water (n.1) + proof (n.). Noun meaning "garment of waterproof material" is from 1799. The verb is first recorded 1843. Related: Waterproofed; waterproofing.
Waterloo
watermark
watermelon
water-moccasin
water-pipe
waterproof
watershed
water-ski
waterspout
water-table
watertight