smokeproof

[ smohk-proof ]
/ ˈsmoʊkˌpruf /

adjective

that cannot be penetrated by smoke: a fireproof and smokeproof compartment.

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Origin of smokeproof

First recorded in 1900–05; smoke + -proof
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020