The Collaborative International Dictionary of English v.0.48:

Brandish \Bran"dish\, v. t. [imp. & p. p. Brandished; p. pr. &
   vb. n. Brandishing.] [OE. braundisen, F. brandir, fr. brand
   a sword, fr. OHG. brant brand. See Brand, n.]
   1. To move or wave, as a weapon; to raise and move in various
      directions; to shake or flourish.
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            The quivering lance which he brandished bright.
                                                  --Drake.
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   2. To play with; to flourish; as, to brandish syllogisms.
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