This is not a dictionary! - Search for "soundproof" in The Danish Dictionary
May 8. 2013 from wordnet.princeton.edu
insulate against noise; "Proust had his apartment soundproofed"
March 31. 2016 from wordnet.princeton.edu
soundproof — adjective — english
impervious to, or not penetrable by, sound; "a soundproof room"
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