Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

EXAMPLES FROM THE WEB FOR IMPENETRABLE

“An impenetrable mystery” was sure “to hang for ever” as far as all mankind was concerned.

Kirkwood smiled grimly, with a face of brass, impenetrable, inflexible.

Go not to the Alhambra: the fort is impenetrable—the guard faithful.

He had been prepared for abuse, but not for impenetrable silence.

Since then Tawabinisy had hidden himself behind his impenetrable grin.

Night had now closed in the most dense and impenetrable darkness.

Every thing had the face of uncultivated luxuriance, and impenetrable solitude.

I turned to find the dark and impenetrable eyes of von Francius fixed on me.

In one moment an impenetrable barrier had been erected between them.

But in the morning he was compelled to stop before the impenetrable ice.

MORE RELATED WORDS FOR IMPENETRABLE

Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.