mildewproof

[mil-doo-proof, -dyoo-]

adjective

able to withstand or repel the effect of mildew.

verb (used with object)

to enable (fabric, paper, etc.) to withstand or repel the effect of mildew.

Origin of mildewproof

mildew + -proof

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018