inability

disability, inability

这一对词都表示“无能”之意，但涵义有细微的差异。
disability: 着重表示“因受伤而变残废所引起的无能”（lacking ability caused by injury）或“因天生的缺陷而导致的无能”（inherent defect）；用于法律方面，它表示“不够资格”、“不合格”（legal disqualification）之意。

• he has a disability pension because he lost his legs while he was in the army.
  他领取伤残抚恤金，因为他在军队服役时失去了双腿。
• he was always cheerful in spite of his disability.
  他虽然有残疾，但心情一直很愉快。

inability: 着重表示“缺少能力”或“缺乏手段”（lack of power or means）的意味。

• his inability to undertake the work is due to his physical disabilities.
  他没有能力承担该工作，是由于他的残疾。
• can you account for your inability to pay the debt?
  您能否解释无法偿债的原因吗？

名词 inability:

1. lack of ability (especially mental ability) to do something
2. lacking the power to perform
   同义词：unfitness

1. Discomfort or illness resulting from this inability or difficulty.
   消化不良由于上述消化吸收能力欠缺或困难而引起的不适或疾病
2. The persistent inability to conceive a child.
   不孕持续的不能怀孕的能力
3. The book's weakness is the author's inability to sustain an argument.
   该书的缺点在於作者未能把论证展开。
4. His inability to speak French puts him at a disadvantage.
   他不会说法语，这使他很吃亏。

in.a.bil.i.ty

n.（名词）
Lack of ability or means.
无能：缺乏能力或方法