prevent the occurrence of; prevent from happening;
"Let's avoid a confrontation"
"head off a confrontation"
"avert a strike"
avert, turn away, or repel;
"Ward off danger"
- We had to think of a way to keep off the infection.
- It is our duty to fend off a thief from obtaining his gains.
- The politician fended off the question.
- He tried to stand off his creditors.
- ward off 防止