difficult

adjectives

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"; "why is it so hard for you to keep a secret?"
difficult, hard
is derived from
difficultness
antonym
easy
hard to control
"a difficult child", "an unmanageable situation"
difficult, unmanageable