1. 避开，躲开，防止(危险、疾病等)
To ward off a danger or illness means to prevent it from affecting you or harming you.

1. avert, turn away, or repel

e.g. Ward off danger

2. prevent the occurrence of
prevent from happening

e.g. Let's avoid a confrontation
head off a confrontation
avert a strike

Synonym: debarforefendforfendobviatedeflectaverthead offstave offfend offavoid