with obj.
1- join together again; reunite重新接合; 使再结合：
the stone had been cracked and crudely rejoined.
这块石头被砸裂后, 又被马虎地重新接合。
1.1
- return to (a companion, organization, or route that one has left)重返, 重新加入（组织, 路线）; 重与…为伴：
the soldiers were returning from leave to rejoin their unit.
休假后士兵陆续返回部队。
reporting verb
- say something in answer to a remark, typically rudely or in a discouraging manner应答; （顶撞地）回答; 反驳：
with clause Harry said that he longed for a bath and soft towels, to which his father rejoined that he was a gross materialist.哈里说他渴望能洗个澡, 并能用上软毛巾, 对此他父亲顶了一句, 说他是个不折不扣的物质主义者。
词源
late Middle English （in the sense 'reply to a charge or pleading in a lawsuit'）： from Old French rejoindre, from re- 'again' + joindre 'to join'.