differ (v.)youdaoicibaDictYouDict[differ 词源字典]
late 14c., from Old French differer (14c.) and directly from Latin differre "to set apart, differ," from dis- "away from" (see dis-) + ferre "carry" (see infer).

Two senses that were present in Latin have gone separate ways in English since c. 1500 with defer (transitive) and differ (intransitive). Related: Differed; differing.[differ etymology, differ origin, 英语词源]