crux

US /ˈkrʌks/

UK /ˈkrʌks/

症結, 關鍵, 核心

the most important or essential point of an issue or problem

•

The crux of the matter is that we don't have enough funding.

問題的症結在於我們沒有足夠的資金。

•

He finally got to the crux of his argument.

他終於談到了他論點的核心。