inanition (n.)

in medicine, "exhaustion from lack of nourishment," c. 1400, "pathological draining or depletion of blood, humors, or bodily fluids," from Old French inanition (14c.) and directly from Latin inanitionem (nominative inanitio) "emptiness," noun of action from past participle stem of inanire "to empty," from inanis "empty, void; worthless, useless," a word of uncertain origin.