Antonyms of adj rainproof

1 sense of rainproof

Sense 1
rainproof, waterproof, waterproofed -- (not permitting the passage of water)

INDIRECT (VIA tight) -> leaky -- (permitting the unwanted passage of fluids or gases ; "a leaky roof"; "a leaky defense system")

Similarity of adj rainproof

1 sense of rainproof

Sense 1
rainproof, waterproof, waterproofed -- (not permitting the passage of water)
       => tight (vs. leaky) -- (of such close construction as to be impermeable; "a tight roof"; "warm in our tight little house")