impenetrable

adjective/ɪmˈpɛnɪtrəbəl/

Frequency rank: #12,138 of 20,003 in the WORDED list (wordfreq data)

Meaning

impossible to pass through or get into; impossible to understand.

Illustration for the English word “impenetrable”

Example sentence

The ancient forest was so dense that it seemed completely impenetrable.

Synonyms & related words

More words in ranks 12,101–12,200