Where does “impenetrable” come from?
Impenetrable derives from Middle French impenetrable, from Latin impenetrabilis, combining the Latin negation in- with a root meaning "to pierce or pass through" from Proto-Indo-European pen-et-s.
impenetrable (English): Not penetrable; Incomprehensible; fathomless;...
Definitions
- Not penetrable; Incomprehensible; fathomless;...
Ancestry of “impenetrable”, step by step
Words derived from “impenetrable”