impervious Synonyms - page 2

water-resistant water-repellent soundproof hermetically sealed unresponsive unprocurable rainproof unreachable rustproof closed to armor-plated heartless hermetic immune imperforate impersuasible imporous impregnable inaccessible inapproachable inclosed indifferent inexecutable hard-mouthed hardened ballproof bombproof bullhead caecal callous cast iron close cold cold-hearted cool dead-hearted hard infeasible innavigable repellent resistant resistive sealed shellproof stiff-backed stockish tearless thick-skinned tight unaffected