tr.v., -stirred, -stir·ring, -stirs.
To cause to become active; rouse: finally bestirred himself to look for work.
[Middle English bistiren : probably bi-, be- + stiren, to rouse; see stir1.]
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.