From Longman Dictionary of Contemporary Englishfrighten somebody ↔ away phrasal verbLEAVE A PLACEto make a person or animal go away by making them feel afraid Terrorist activity in the area has frightened most tourists away. → frighten→ See Verb table
Examples from the Corpus
frighten away• As is now clear, it was this totally unnecessary act of hubris that more than anything else frightened the voters away. 