overwork

n. 过度操劳,过度工作
v. 工作过度

His illness grew out of his tendency to overwork.

他的病是由于工作过度所致。

Self- make men are very apt to usurp the prerogative of the almighty and overwork themselves.

全凭一己奋斗而成功的人，大有篡夺上帝的大权之势而过度工作。