crux
US /ˈkrʌks/
UK /ˈkrʌks/

1.
inti, pokok, titik penting
the most important or essential point of an issue or problem
:
•
The crux of the matter is that we don't have enough funding.
Inti masalahnya ialah kita tidak mempunyai dana yang mencukupi.
•
He finally got to the crux of his argument.
Dia akhirnya sampai ke inti hujahnya.