치명적인 in English:

The loneliness and drabness of working away from people are fatal to his best effort.

Life is a fatal sexually transmitted disease.

Fatal errors arise from carelessness.

fatal disease

Make the best of one's lot with fatal resignation.

About a third of these diseases can be cured, but the others may be serious, or even fatal.

Even though the rescuers arrived quickly, the injuries proved to be fatal.

The definition of fatal is something that causes death or that leads to failure or disaster. When you are shot in the head, this is an example of a wound that could be described as fatal.

Most fatal accidents happen on country roads.

A heart attack happens when the blood supply to the heart muscle is suddenly blocked. The blockage means the heart can’t work effectively, so a heart attack can be fatal.

The car accident turned out to be fatal. Two people died.

Cobra bite can be fatal.

Doing nothing was also likely to be fatal before very long.

However he has to take it at fixed intervals, just one day without taking it is swiftly fatal.