noun
difficulty
DIF-ih-kul-tee/ˈdɪfɪkəlti/
The need for effort to accomplish or understand something.
She has difficulty pulling the loaded hand truck up the step.

Etymology
The pieces express the state of being 'not easy to do.' The word extended from the quality that makes something laborious or perplexing to a particular problem or obstacle.
In context
we made some great progress I think we should not underestimate the difficulty of president mushara after 911 being called upon to make a strategic shift
More examples
- I have difficulty understanding his explanation.
- The difficulty of the puzzle surprises me.
- We run into difficulties when the roads flood.
Forms
difficulty · difficulties
difficult adjective — Requiring considerable effort to do or understand.