Enmity; antagonism; being at odds—mutual hostility or feud between parties.
二つの派閥は長年にわたって反目してきた。
The two factions have been at odds with each other for many years.
相続をめぐって兄弟が反目した。
The siblings fell out over the inheritance.
企業間の反目が交渉を難しくした。
Hostility between the companies made negotiations difficult.