impenetrable
| 1. |
(satellite adjective) impossible to understand; "impenetrable jargon" |
|
| 2. |
(adjective) not admitting of penetration or passage into or through; "an impenetrable fortress"; "impenetrable rain forests" |
|
Antonyms: penetrable |
|
| 3. |
(satellite adjective) permitting little if any light to pass through because of denseness of matter; "dense smoke"; "heavy fog"; "impenetrable gloom" |
|
Synonyms: dense, heavy |
|
|