The Collaborative International Dictionary of English v.0.48:

Bestir \Be*stir"\, v. t. [imp. & p. p. Bestirred; p. pr. & vb.
   n. Bestirring.]
   To put into brisk or vigorous action; to move with life and
   vigor; -- usually with the reciprocal pronoun.
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         You have so bestirred your valor.        --Shak.
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         Rouse and bestir themselves ere well awake. --Milton.
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