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impervious

English

  1. 🔊 not admitting of passage or capable of being affected
    “a material impervious to water”

Similar words

imperviable philistine airtight ballproof beyond reach bombproof bulletproof burglarproof callous calloused case-hardened closed forever to closed to corrosionproof dampproof fire-resisting fireproof flameproof flinty foolproof hard hardened hardhearted hermetic