1. Qu'on ne peut pénétrer.
2. (Au figuré) Secret. Attitude impénétrable.
ETYM French hermétique. Related to Note under Hermes, 1.
The airtight sealing of an object.
Completely sealed; completely airtight.
Of or relating to sorcery or alchemy.
ETYM Latin impenetrabilis; pref. im- not + penetrabilis penetrable: cf. French impénétrable.
1. Impossible to understand.
2. Not admitting of penetration or passage into or through.
ETYM Latin inscrutabilis; cf. French inscrutable. Related to In- not, and Scrutiny.
Impossible or difficult to be explained or accounted for satisfactorily; obscure; incomprehensible.