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Synset

not admitting of passage or capable of being affected
<adj.all>   freq. cnt.: 1 freq. cnt.: 1

imperviable more info
impervious more info

sample sentences

"a material impervious to water"
"someone impervious to argument"
lexical pointers
antonym
pervious
derivationally related form
imperviousness
semantic pointers
also see
impermeable
similar to
fast acid-fast colorfast greaseproof mothproof, moth-resistant proof resistant corrosion-resistant rot-resistant runproof, ladder-proof, run-resistant soundproof