vt.

1. 挫败；阻挠；使感到灰心
   They made their preparations to frustrate the conspiracy.

   他们作好准备挫败这个阴谋。

   He was frustrated by repeated failures.

   他因一再失败而灰心丧气。

2. 使无效

a.

1. 受挫的；失望的
2. 无益的，无效的
   The prisoner made a frustrate attempt to escape.

   囚犯妄图逃跑。

v.

1. prevent (a plan or action) from progressing, succeeding, or being fulfilled.
   ▸prevent (someone) from doing or achieving something.
2. cause (someone) to feel dissatisfied or unfulfilled.

adj.