soundproof

Adjective
  1. Impervious to, or not penetrable by, sound (synset 301779965)
    "a soundproof room"
    similar to: imperviable, impervious - not admitting of passage or capable of being affected
Verb
  1. Insulate against noise (synset 200496441)
    "Proust had his apartment soundproofed"
    is a type of: insulate - protect from heat, cold, or noise by surrounding with insulating material

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