impenetrable
US /ɪmˈpen.ə.trə.bəl/
UK /ɪmˈpen.ə.trə.bəl/
1.
坚不可摧的, 无法穿透的
impossible to pass through or enter
:
•
The fortress had an impenetrable defense system.
这座堡垒有一个坚不可摧的防御系统。
•
The dense jungle was almost impenetrable.
茂密的丛林几乎无法穿透。
2.
难以理解的, 费解的
impossible to understand; incomprehensible
:
•
His handwriting was almost impenetrable.
他的笔迹几乎难以辨认。
•
The philosopher's theories were often impenetrable to the average person.
这位哲学家的理论对于普通人来说常常是难以理解的。