Frighten away means to scare off or cause someone to leave. Synonyms for 'frighten away' include deter, repulse, discourage, dissuade, intimidate, daunt, terrify, spook, startle, discourage, drive off, chase away and cause to flee. Each of these synonyms can describe the act of causing fear and making someone feel threatened with the intention of making them leave or stay away. In some situations, it may be necessary to use these synonyms to describe an event or to communicate clearly the impact and result of a particular action. Using these specifically chosen words, a writer or speaker can convey their intentions and the details of an event precisely.