impermeable
adjective/ɪmˈpɜːmiəbl/
/ɪmˈpɜːrmiəbl/
(specialist)- impermeable (to something) not allowing a liquid or gas to pass through
- impermeable rock
- The insulating material should be impermeable to water vapour.
Word Originlate 17th cent.: from French imperméable, or from late Latin impermeabilis, from in- ‘not’ + permeabilis (from permeare ‘pass through’, from per- ‘through’ + meare ‘pass, go’).Definitions on the go
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impermeable