difficult

US /ˈdɪf.ə.kəlt/
UK /ˈdɪf.ə.kəlt/
"difficult" picture
1.

difficile, ardu

needing much effort or skill to accomplish, deal with, or understand.

:
The exam questions were very difficult.
Les questions de l'examen étaient très difficiles.
It's a difficult decision to make.
C'est une décision difficile à prendre.
2.

problématique, épineux

full of problems; problematic.

:
They are going through a very difficult period.
Ils traversent une période très difficile.
He has a difficult personality.
Il a une personnalité difficile.