difficulty
US /ˈdɪf.ə.kəl.t̬i/
UK /ˈdɪf.ə.kəl.t̬i/

1.
2.
a thing that is hard to accomplish, deal with, or understand
:
•
He overcame many difficulties to achieve his goal.
•
Solving this puzzle presents a real difficulty.
a thing that is hard to accomplish, deal with, or understand