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(), a.[Pref. im- not + permeable: cf. F. impermable, L. impermeabilis.] Not permeable; not permitting passage, as of a fluid. through its substance; impervious; impenetrable; as, India rubber is impermeable to water and to air. -- Imper"meableness, n. -- Imper"meably, adv. スポンサード リンク
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