Definition
to begin to dislike or oppose someone or something, or to cause someone to do so
（使某人）不再喜欢；（使某人）反对；（使某人）成为敌人
His rumors ultimately turned her against him.
他的谣言最终让她对他产生了敌意。
The plot of the movie turned me against that character.
电影的情节让我对那个角色产生了反感。
He intentionally misled her to turn her against her old friends.
他故意误导她，让她与老朋友们反目成仇。