Associations to the word «Impenetrable»

Wiktionary

IMPENETRABLE, adjective. Not penetrable.
IMPENETRABLE, adjective. (figuratively) Incomprehensible; inscrutable.

Dictionary definition

IMPENETRABLE, adjective. Not admitting of penetration or passage into or through; "an impenetrable fortress"; "impenetrable rain forests".
IMPENETRABLE, adjective. Permitting little if any light to pass through because of denseness of matter; "dense smoke"; "heavy fog"; "impenetrable gloom".
IMPENETRABLE, adjective. Impossible to understand; "impenetrable jargon".

Wise words

A word is not a crystal, transparent and unchanged; it is the skin of a living thought and may vary greatly in color and content according to the circumstances and time in which it is used.
Oliver Wendell Holmes, Jr.