Hard to do or to make; beset with difficulty; attended with labor, trouble, or pains; not easy; arduous.

Hard to manage or to please; not easily wrought upon; austere; stubborn; as, a difficult person.

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?"

requiring much effort and trouble; "the mountain climb was long, steep, and difficult"

hard to do, understand, cannot be done with ease

Not easy, but not impossible.