asthenia

n. weakness

Asthenia (Greek: ασθένεια, lit. lack of strength but also disease) is a medical term denoting a feeling of weakness without actual loss of strength.
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Asthenia /as·the·nia/ lack or loss of strength and energy; weakness. neurocirculatory asthenia a syndrome of breathlessness, fear of effort, a [more]Asthenia - Community and Resources

Noun
1. an abnormal loss of strength
(synonym) astheny
(hypernym) infirmity, frailty, debility, feebleness, frailness

(n.)
Alt. of Astheny