Origin of impenetrable
Examples from the Web for impenetrably
“In this country that we were told was impenetrably dangerous, guys were just turning up,” he said.
At times he was grimly, impenetrably silent, and often he said things that would have wounded a tender heart past healing.Olive in Italy|Moray Dalton
"Till nine o'clock or a little after," suggested Mrs. Travers, impenetrably.The Rescue|Joseph Conrad
Unfortunately, as far as the authentic memorials of the past go, no other chapter is so impenetrably obscure as this.The Story of Evolution|Joseph McCabe
There was nothing tenuous, elusively subtle, or impenetrably mysterious any longer about the ghostly apparition.Campfire Girls at Twin Lakes|Stella M. Francis
Mr. Vanborough looked back into the far corner of the room, in which the lawyer sat, impenetrably waiting for events.Man and Wife|Wilkie Collins
British Dictionary definitions for impenetrably
Word Origin and History for impenetrably
mid-15c., from Middle French impenetrable, from Latin impenetrabilis "that cannot be penetrated," from assimilated form of in- "not, opposite of" (see in- (1)) + penetrabilis "penetrable" (see penetrate). Related: Impenetrably; impenetrability.