impenetrably
🇺🇸
/ɪmˈpenɪtrəbli/
🇬🇧
/ɪmˈpenɪtrəbli/
so difficult to understand that it's like a secret
The instructions were written in a language that was impenetrably complex.
这些说明用一种难以理解的语言写成。
so thick or dense that nothing can pass through
The forest was so dense that it was impenetrably dark inside.
森林如此茂密,内部幽暗得无法穿透。