impenetrability

Definitions of impenetrability
1

n the quality of being impenetrable (by people or light or missiles etc.)

Synonyms:
imperviousness
Antonyms:
penetrability, perviousness
the quality of being penetrable (by people or light or missiles etc.)
Type of:
quality
an essential and distinguishing attribute of something or someone

n incomprehensibility by virtue of being too dense to understand

Synonyms:
impenetrableness
Type of:
incomprehensibility
the quality of being incomprehensible

Sign up, it's free!

Whether you're a student, an educator, or a lifelong learner, Vocabulary.com can put you on the path to systematic vocabulary improvement.