Complexities and Difficult

adjective

• Not easy; requiring great physical or mental effort to accomplish or comprehend or endure.
  • usage: "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"
  • synonyms: hard
• Hard to control.
  • usage: "a difficult child, "an unmanageable situation"
  • synonyms: unmanageable

• (a.) Hard to do or to make; beset with difficulty; attended with labor, trouble or pains; not easy; arduous.
• (a.) Hard to manage or to please; not easily wrought upon; austere; stubborn; as, a difficult person.
• (v.t.) To render difficult; to impede; to perplex.