grind someone down
phrasal verb with grind verb [ T ] uk/ɡraɪnd/ us/ɡraɪnd/ ground | ground
长期欺压（某人）;长时间虐待（某人）（使其失去反抗能力）
to treat someone so badly for such a long time that they are no longer able to fight back
Ground down by years of abuse, she did not have the confidence to leave him. 多年来所受的虐待已经使她丧失了逃离他魔爪的信心。