mildewproof

[mil-doo-proof, -dyoo-]

adjective

able to withstand or repel the effect of mildew.

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verb (used with object)

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

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Origin of mildewproof

mildew + -proof

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