The doctor resected the diseased part of the patient's liver during surgery.

resected 是动词 resect 的过去式，resect 由前缀 re-（表示"再次"或"回"）和词根 sect（来自拉丁语 secare，意为"切割"）组成，字面意思是"重新切割"或"切除"。在医学语境中特指"手术切除（病变组织）"。