antagonistic relationship; oppositional relationship
Refers to a relationship characterized by conflict, opposition, or antagonism between two or more parties.
The two countries have been in an antagonistic relationship for many years.
The antagonistic relationship between the boss and the subordinate has become a problem.
対立 is the abstract concept of opposition or conflict, while 対立関係 specifically refers to the relationship itself.
敵対関係 implies a more hostile, enemy-like relationship, whereas 対立関係 can be used for milder opposition or conflicting interests.
Compound of 対立 (opposition, conflict) and 関係 (relationship).