unmask

/AH0 N M AE1 S K/
verb
  1. 1

    To remove a mask from someone.

  2. 2

    To expose, or reveal the true character of someone.

  3. 3

    To remove one's mask.

  4. 4

    To enable (an interrupt, etc.) by unsetting or setting the associated bit.

Source: https://en.wiktionary.org/wiki/unmask