Words · Familiar
impenetrable
/ˌɪmˈpɛnətɹəbəl/ · 12 letters · 10 distinct letters
- adjective
not admitting of penetration or passage into or through
an impenetrable fortress
- adjective
permitting little if any light to pass through because of denseness of matter
dense smoke
- adjective
impossible to understand
impenetrable jargon