whets

/W EH1 T S/
verb
  1. 1

    To hone or rub on with some substance, as a piece of stone, for the purpose of sharpening – see whetstone.

  2. 2

    To stimulate or make more keen.

    to whet one's appetite or one's courage

  3. 3

    To preen.

Source: https://en.wiktionary.org/wiki/whet, https://en.wiktionary.org/wiki/whets