The phrase "scare away" means to cause someone or something to withdraw or avoid a situation out of fear or intimidation. Synonyms for this action include deter, frighten off, repel, intimidate, discourage, dissuade, drive away, and make someone wary. These words all convey a sense of making someone feel less comfortable or safe in a given situation. Other synonyms for "scare away" may depend on the specific situation, such as deterring burglars from a home, repelling insects from a garden, or dissuading someone from pursuing a harmful course of action. In any context, the goal is to create a feeling of unease or danger that motivates avoidance.