B1
when something is not easy to do or understand
Dictionary examples:
The difficulty of staying awake in boring meetings is my ultimate test of willpower. (0.0)
I experience great difficulty in not laughing when my boss tells his terrible jokes. (0.0)
I have difficulty understanding why my phone always dies when I need it most. (0.0)
She had great difficulty finding a job. (18.2)
We finished the job, but only with great difficulty. (22.0)
The difficulty of the task excited them. (57.7)