phthisis (n.)youdaoicibaDictYouDict[phthisis 词源字典]
1520s, from Late Latin phthisis "consumption," from Greek phthisis "wasting, consumption; perishing, decay; waxing," from phthiein "to decay, waste away," from PIE root *dhgwhei- "to perish, die away" (cognates: Sanskrit ksitih "destruction," ksinati "perishes").[phthisis etymology, phthisis origin, 英语词源]