v.
  - cause great fear or nervousness in; frighten. 
▸
(scare someone away/off)
 drive or keep someone away by frightening them.
 ▸become scared.
 - 
(scare something up)
 informal, chiefly N. Amer. find or obtain something.
 
n.
 a sudden attack of fright. 
▸a period of general anxiety or alarm about something:
 a bomb scare.
 
  Derivative
  
  Etymology
  ME: from ON skirra ‘frighten’, from skjarr ‘timid’.