'Mask' in the Bible

And the eye of the adulterer watches for the twilight, thinking, 'No eye can see me,' and covers his face with a mask.

and who swallow up the property of widows and then mask their wickedness by making long prayers: these men will receive far heavier punishment."

who swallow up the property of widows and mask their wickedness by making long prayers. They will be punished far more severely than others."