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c.1400, from Old French inanition, from Latin inanitionem (nominative inanitio) "emptiness," noun of action from past participle stem of inanire "to empty," from inanis "empty, void, worthless, useless," of uncertain origin.
inanition in·a·ni·tion (ĭn'ə-nĭsh'ən)
Exhaustion, as from lack of nourishment or vitality.