vt.

1. 削弱，減弱；減少
   We never weaken our efforts in face of difficulties.

   我們在困難面前從不鬆勁。

2. 使變弱；使變淡

vi.

1. 變弱；變衰弱
   His sense of duty never weakens.

   他的責任感從不會減弱。

2. 變軟弱；畏縮；動搖

v.