overstrain

Nor must the schoolmaster's own work be excessive, for nervous overstrain will very readily lead to outbreaks of violence.

There is nothing we moderns are more apt to brag of than the nervous overstrain of our life.

It's a splendid relief from the overstrain and stimulus of the past few scholastic months.

Unless we accept his conduct as the result of a momentary dementia, produced by overstrain, it must remain inexplicable.

If any other wheelman chooses to tire his muscles and overstrain his heart for a mere bit of boasting, let him do it.