perseverance (n.)youdaoicibaDictYouDict[perseverance 词源字典]
mid-14c., from Old French perseverance "persistence, endurance" (12c., Modern French persévérance) and directly from Latin perseverantia "steadfastness, constancy," from perseverantem (nominative perseverans), from perseverare (see persevere).[perseverance etymology, perseverance origin, 英语词源]