problem
Pronunciation: /ˈprɒbləm/
noun
- 1a matter or situation regarded as unwelcome or harmful and needing to be dealt with and overcome: they have financial problems the problem of ageism in Hollywood
- a thing that is difficult to achieve: motivation of staff can also be a problem
- 2 Physics & Mathematics an inquiry starting from given conditions to investigate or demonstrate a fact, result, or law.
- Geometry a proposition in which something has to be constructed. Compare with theorem.
- (in chess) an arrangement of pieces in which the solver has to achieve a specified result.

Phrases
-
have a problem with
- disagree with or have an objection to: I have no problem with shopping on Sundays
-
no problem
- used to express one’s agreement or acquiescence: ‘Can you come over here right away?’ ‘No problem.’
-
that's your (or his, her, etc.) problem
- used to express one’s lack of interest in or sympathy with another person’s problems: he’d made a mistake but that was his problem

Origin:
late Middle English (originally denoting a riddle or a question for academic discussion): from Old French probleme, via Latin from Greek problēma, from proballein 'put forth', from pro 'before' + ballein 'to throw'