impermeable
adjective
[ ɪmˈpəːmɪəb(ə)l ]
• not allowing fluid to pass through.
• "an impermeable membrane"
Similar:
watertight,
waterproof,
damp-proof,
water-resistant,
water-repellent,
airtight,
tight,
sealed,
hermetically sealed,
closed,
impenetrable,
impregnable,
inviolable,
resistant,
imperviable,
Origin:
late 17th century: from French imperméable, or from late Latin impermeabilis, from in- ‘not’ + permeabilis (see permeable).
