Impenetrable
/ɪmˈpɛnətɹəbəl/
Last Updated: January 2, 2026 at 12:30 PM
Scrabble:18 ptsWWF:23 pts12 letters
Definition of Impenetrable
adjective
- Not penetrable.
"The fortress is impenetrable, so it cannot be taken."
- Incomprehensible; fathomless; inscrutable.
"Business jargon makes this document impenetrable, I can't understand it."
- Opaque; obscure; not translucent or transparent.
"When night falls, she cloaks the world in impenetrable darkness."
Anagrams of Impenetrable
Words You Can Make
50 words can be made from the letters in "impenetrable":
10-LETTER WORDS
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Related Word Patterns
Synonyms & Antonyms
SYNONYMS
impregnableunfathomable
ANTONYMS
fathomablepenetrablepregnable