The Collaborative International Dictionary of English v.0.48:

Scare \Scare\, v. t. [imp. & p. p. Scared; p. pr. & vb. n.
   Scaring.] [OE. skerren, skeren, Icel. skirra to bar,
   prevent, skirrask to shun, shrink from; or fr. OE. skerre,
   adj., scared, Icel. skjarr; both perhaps akin to E. sheer to
   turn.]
   To frighten; to strike with sudden fear; to alarm.
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         The noise of thy crossbow
         Will scare the herd, and so my shoot is lost. --Shak.
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   To scare away, to drive away by frightening.

   To scare up, to find by search, as if by beating for game.
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   Syn: To alarm; frighten; startle; affright; terrify.
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