[mass noun]lack of mental or spiritual vigour and enthusiasm 活力不足 she was thinking that old age bred inanition. 她在想是老龄导致活力不足。 ■exhaustion caused by lack of nourishment 缺乏营养性衰竭,虚弱
语源
late Middle English: from late Latin inanitio(n-), from Latin inanire 'make empty', from inanis 'empty, vain'