The personalities of my parents were very different but at the same time they were a very compatible couple.

compatible 由前缀 com-（表示"共同"）和词根 pati（来自拉丁语 pati，意为"忍受、承受"）以及形容词后缀 -able（表示"能够...的"）组成。字面意思是"能够共同承受的"，引申为"能和谐共处的、相配的"。在句中形容夫妻关系融洽、相处和谐。