discharge、dismiss与fire都有“解雇、开除”之意。

discharge : 语气较重，指有理由的解雇，含几乎不再复用的意味。

She was discharged from the police force for bad conduct.

她因行为不轨被清除出警察队伍。

dismiss : 正式用词，是这组词中语气最轻的一个词，一般只有从上文才能看解雇的原因或理由。

He has been dismissed from his job for incompetence.

他因无法胜任工作而被解职。

She claims she was unfairly dismissed from her post.

她声称自己被无理免职。

fire : 口语用词，多指被断然地突然解雇，其行动犹如开枪一样干净利落。

She was fired after she was caught stealing from her employer.

她因偷雇主的东西时当场被抓而遭解雇。

He was fired from his $165,000 job for poor performance.

他因为表现不佳丢掉了他薪资16.5万美元的工作。