difficult
Pronunciation: /ˈdɪfɪk(ə)lt/
adjective
- needing much effort or skill to accomplish, deal with, or understand: she had a difficult decision to make the questions are too difficult for the children
- characterized by or causing hardships or problems: a difficult economic climate
- (of a person) not easy to please or satisfy; awkward: Lily could be difficult

Origin:
late Middle English: back-formation from difficulty