frustrate

英 [frʌ'streɪt; 'frʌs-] 美['frʌstret]

• vt. 挫败；阻挠；使感到灰心
• vi. 失败；受挫
• adj. 挫败的；无益的

1. hinder or prevent (the efforts, plans, or desires) of;

"What ultimately frustrated every challenger was Ruth's amazing September surge"

"foil your opponent"

2. treat cruelly;

"The children tormented the stuttering teacher"