impenetrable
/ɪmˈpenɪtrəbl/adjective
1
- impossible to pass through or enter不可通行的, 不能进入的：
a dark, impenetrable forest.
一片黑漆漆、难穿越的森林。
1.1
- (of a club or group) secretive and exclusive（俱乐部, 团体）守密的, 排外的：
an impenetrable clique.
密不透风的小集团。
1.2
- impervious to new ideas or influences守旧的：
his career shows just how impenetrable European assumptions were.
他的经历说明欧洲当时的想法是如何的守旧。
1.3
- Physics (of matter) incapable of occupying the same space as other matter at the same time【物理】（物质）不可入性的。
2
- impossible to understand不可理解的, 令人费解的：
impenetrable interviews with French intellectuals.
与法国知识分子令人费解的访谈。
派生词
impenetrability
nounimpenetrably
adverb词源
late Middle English: via French from Latin impenetrabilis, from in- 'not' + penetrabilis 'able to be pierced'， from the verb penetrare （see PENETRATE）.