weakness

(n) a flaw or weak point
- he was quick to point out his wife's failings
failing,
(n) powerlessness revealed by an inability to act
- in spite of their weakness the group remains active
helplessness, impuissance,
(n) the property of lacking physical or mental strength; liability to failure under pressure or stress or strain
- his weakness increased as he became older
- the weakness of the span was overlooked until it collapsed
(n) the condition of being financially weak
- the weakness of the dollar against the yen
(n) a penchant for something even though it might not be good for you
- he has a weakness for chocolate