挥舞to wave

• 手一挥

  wave a hand

• 挥刀砍去

  chop at with a sweep of a knife

• 挥刀砍掉

  chop off with one sweep of a knife

• 一挥而就。

  Just one stroke of the pen and it's done.

抹掉to wipe away

• 挥汗

  wipe away sweat

• 挥去灰尘

  brush away dust

• 挥开苍蝇

  brush away a fly

指挥to command

散去to scatter