He announced his disengagement from political activities to focus on family life.

disengagement 是由前缀 dis-（表示"否定、相反"）和名词 engagement（"参与、约定"）组成的名词。engagement 来自动词 engage（"参与、从事"），加上名词后缀 -ment。 disengagement 字面意思是"不参与、脱离"，指从某种活动或关系中退出或解除联系的状态。