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Word of the Day Tuesday, June 9, 2026

impenetrable

/ɪmˈpɛntrəbəl/ adjective · British & US
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What does impenetrable mean?

adjective

Impossible to penetrate or understand; completely opaque or unclear. Difficult to understand or interpret.

Example

"The professor's explanation was impenetrable to the students, who were left confused."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for impenetrable

Antonyms of impenetrable

Rhymes with impenetrable

Etymologically related