conflict
n. C / Un. a serious disagreement or argument between people, groups, or countries. It can also describe a situation where two ideas or interests cannot exist together.
n. a state of incompatibility or active hostility between entities, ideas, or interests. Often used to describe prolonged armed struggles or the psychological tension between opposing internal impulses.
The two coworkers had a conflict over the new office rules.
The mediator worked for hours to resolve the conflict between the management and the local labor union.
The novel explores the internal conflict of a protagonist torn between his duty to his family and his desire for personal independence.
From Latin conflictus, past participle of confligere (“to strike together”), from com- (“together”) (a form of con-) + fligere (“to strike”).
Often takes the prepositions 'between' or 'with'; frequently used in the phrase 'in conflict with'.
They have a conflict about the moneyThey have a conflict over the moneyWhile 'about' is understood, 'over' or 'between' are the standard collocations for the source of a disagreement.