You forgot that I have many enemies, who will stop at nothing to ruin my work!

Don't move a muscle or you'll ruin all my work.

"But then I ruined your good work by glaring."

"Meaning someone set a contact bomb to ruin our work here, and perhaps blow me up at the same time!"

Raggety ruined their work by moving into different trees and killing them off.

These unutterable people upon the telephone have already ruined my morning's work, so that a little more can hardly matter.

One fighter flying low overhead can ruin a whole day's work.

"But there is still one more truth to face: I've ruined your work."

When the other students discovered that he was a Christian they picked on him all the time, frequently ruining his work.