英 [ɪmˈpenɪtrəb(ə)l] 美 [ɪmˈpenɪtrəb(ə)l]
adj. 不可进入的，无法透视的；不可理解的，令人费解的；顽固的；（物理）（物质）不可入性的
impenetrable /ɪmˈpɛnɪtrəbəl/ TEM8
形容词 If you describe something such as a barrier or a forest as impenetrable, you mean that it is impossible or very difficult to get through. (障碍或森林等) 难以穿越的
...the Caucasus range, an almost impenetrable barrier between Europe and Asia.
…高加索山脉，欧亚之间一道几乎不可逾越的屏障。
形容词 If you describe something such as a book or a theory as impenetrable, you are emphasizing that it is impossible or very difficult to understand. 不能理解的
His philosophical work is notoriously impenetrable.
他的哲学著作是出了名地令人费解。
not admitting of penetration or passage into or through
an impenetrable fortress ; impenetrable rain forests
impossible to understand
impenetrable jargon
不可入性的
不透的
... histrionic adj.做作的; 过分戏剧化的; 不自然的; <文>表演的 impenetrable adj. 不能穿过的， 不可理喻的 inarticulate adj. 不能说话的，发音不清的，不善言辞的 ...
... caliber 口径；才干；水准 impenetrable 不能通过的；顽固的；费解的；不接纳的 bestow 使用；授予；放置；留宿 ...
... impending 行将发生的，逼近的 impenetrable 不能穿透的，不可理解的 impenitent 不悔悟的 ...
... impartedenergy传递能量 impenetrable不透的 imperfectcombustion不完全燃的 ...
impenitent 顽固的；不知悔改的
His philosophical work is notoriously impenetrable.
他的哲学著作是出了名地令人费解。
Their jargon is impenetrable to an outsider.
他们的行话外人听不懂。
No system is impenetrable, and none can promise to eliminate the worst case completely.
没有哪个系统是不可攻破的，也没有哪个系统能够保证完全杜绝最坏的情况发生。
Crashes are not uncommon in Papua province where light aircraft, must navigate soaring mountains covered with impenetrable jungle.
VOA : standard.2009.08.02
Impenetrable as offshore trusts may be, their owners still are subject to U.S. law.
An organization with impenetrable silos is not benefiting from the brains of its people.
Frankly, it's aimed at any enemy that decides to locate in some kind of impenetrable location.