The adj difficult has 3 senses (first 2 from tagged texts)
1. (65) difficult, hard -- (not easy; requiring great physical or mental effort to accomplish or comprehend or endure; "a difficult task"; "nesting places on the cliffs are difficult of access"; "difficult times"; "a difficult child"; "found himself in a difficult situation"; "why is it so hard for you to keep a secret?")
2. (1) difficult -- (requiring much effort and trouble; "the mountain climb was long, steep, and difficult")
3. unmanageable, difficult -- (difficult to manage or control; "a difficult child", "an unmanageable situation")