- rainproof, waterproof, waterproofed - not permitting the passage of water
Antonym: leaky (indirect, via tight)
- waterproof - make watertight; "Waterproof the coat"
--1 is one way to seal, seal off
Sample sentence:Derived forms: noun waterproof1, noun waterproof2, noun waterproofing1
The men waterproof the boat