1. History and Etymology for Asthenia borrowed from New Latin, borrowed from Greek asthéneia "weakness, debility," from asthene-, stem of asthenḗs "weak, feeble" (from a- a- entry 2 + -sthenēs,) adjective derivative of sthénos "strength, power" (of obscure origin) + -ia -ia entry 1 Learn More about Asthenia …