Synonyms and Antonyms of impervious
1 not allowing penetration (as by gas, liquid, or light) <the material for this coat is supposed to be impervious to rain> Synonyms impenetrable, impermeable, tightRelated Words close, compact, dense, snug, thick; airtight, hermetic (also hermetical), leakproof, watertight; lightproof, soundproof, waterproofNear Antonyms absorbent, leaky, porous, unsealedAntonyms penetrable, permeable, pervious
2 impossible to get through or into <the rain forest is impervious to all but the most dedicated explorers> Synonyms impassable (also impassible), impermeable, impenetrable, impregnableRelated Words close, compact, dense, thick, tight; compressed, condensed; sturdy, substantial, tough; firm, frozen, hard, solid, stiff; inflexible, rigid, unbending, unyieldingNear Antonyms soft, squishy; bendable, elastic, flexible, giving, malleable, pliable, yielding; absorbent, porousAntonyms negotiable, passable, penetrable, permeable
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