asthenia (n.)youdaoicibaDictYouDict[asthenia 词源字典]
"weakness," 1802, Modern Latin, from Greek asthenia "want of strength, weakness, feebleness, sickness; a sickness, a disease," from asthenes "weak, without strength, feeble," from a-, privative prefix (see a- (3)), + sthenos "strength," which is of uncertain origin.[asthenia etymology, asthenia origin, 英语词源]