the feeling of being annoyed by someone's mistakes or because you have to wait

"I've shown you how to do this before," she said, unable to disguise her impatience. “唉，我以前教过你怎么做的，”她说道，掩饰不住自己的不耐烦。

There's a growing impatience among the electorate with the old two-party system. 选民对旧有的两党制日渐失去耐心。

the feeling of wanting something to happen as soon as possible

[ + to infinitive ] He was already half an hour late, which explains his impatience to leave. 他已经晚了半小时，所以他急着要离开。