To my surprise, “whisk” is not a sound word – it indicates the motion of a besom broom and comes from thence in Norse through Scots into English meaning that general motion.  “Whisker” is its operative form.

• 01.059 they had whisked the trays
• 02.042 I don’t suppose even a weasel would have stirred a whisker at it.
• 08.003 he could catch glimpses of them whisking off the path

“whisk, n.1.” OED Online. Oxford University Press, June 2015. Web. 14 July 2015.

“whisk, v. (adv. and int.).” OED Online. Oxford University Press, June 2015. Web. 14 July 2015.

“whisker, n.1.” OED Online. Oxford University Press, June 2015. Web. 14 July 2015.