Below are possible answers for the crossword clue Impenetrable.
4 letter answer(s) to impenetrable
DEEP
(of darkness) very intense; "thick night"; "thick darkness"; "a face in deep shadow"; "deep night"
a long steep-sided depression in the ocean floor
difficult to penetrate; incomprehensible to one of ordinary understanding or knowledge; "the professor's lectures were so abstruse that students tended to avoid them"; "a deep metaphysical theory"; "some recondite problem in historiography"
exhibiting great cunning usually with secrecy; "deep political machinations"; "a deep plot"
extending relatively far inward; "a deep border"
extreme; "in deep trouble"; "deep happiness"
having great spatial extension or penetration downward or inward from an outer surface or backward or laterally or outward from a center; sometimes used in combination; "a deep well"; "a deep dive"; "deep water"; "a deep casserole"; "a deep gash"; "deep massage"; "deep pressure receptors in muscles"; "deep shelves"; "a deep closet"; "surrounded by a deep yard"; "
5 letter answer(s) to impenetrable
DENSE
hard to pass through because of dense growth; "dense vegetation"; "thick woods"
having high relative density or specific gravity; "dense as lead"
Obtuse
permitting little if any light to pass through because of denseness of matter; "dense smoke"; "heavy fog"; "impenetrable gloom"
slow to learn or understand; lacking intellectual acuity; "so dense he never understands anything I say to him"; "never met anyone quite so dim"; "although dull at classical learning, at mathematics he was uncommonly quick"- Thackeray; "dumb officials make some really dumb decisions"; "he was either normally stupid or being deliberately obtuse"; "worked with the slow students"
6 letter answer(s) to impenetrable
OPAQUE
not clearly understood or expressed
not transmitting or reflecting light or radiant energy; impenetrable to sight; "opaque windows of the jail"; "opaque to X-rays"
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