incapable

1. ADJ Someone who is incapable of doing something is unable to do it. 无能力的[v-link ADJ 'of' -ing/n]

She seemed incapable of making the decision. 她似乎无法做出这个决定。

2. ADJ An incapable person is weak or stupid. 软弱的; 愚蠢的

He lost his job for allegedly being incapable. 据称他是因软弱愚蠢而丢掉了工作。