crux

US /ˈkrʌks/
UK /ˈkrʌks/
"crux" picture
1.

quid, punto crucial, meollo

the most important or essential point of an issue or problem

:
The crux of the matter is that we don't have enough funding.
El quid de la cuestión es que no tenemos suficiente financiación.
He finally got to the crux of his argument.
Finalmente llegó al punto crucial de su argumento.