overwork

Overwork is the ruination of his health.

I hope you’re not overworking that poor boy.

was acclimatized by long hours to overwork;

executives who are overworked and worried.

The doctor said I must cut overwork out.

Anyone with a brain knows that overwork leads to decreased efficiency.

a white-haired pioneer, her face gaunt from overwork and worry.

Her already debilitated constitution is being further weakened by overwork and smoking.