perfection (n.)youdaoicibaDictYouDict[perfection 词源字典]
early 13c., from Old French perfection "perfection, completeness" (12c.), from Latin perfectionem (nominative perfectio) "a finishing, compling, perfection," noun of action from past participle stem of perficere (see perfect (adj.)).[perfection etymology, perfection origin, 英语词源]