2 something, eg a covering resembling a face, used for hiding or protecting the whole or part of the face -- masque
under the mask of friendship.
Her face was a mask
3 to hide or disguise -- masquer, cacher
He managed to mask his feelings.
One crisis should not mask another.
That simple observation is all it takes to condemn a text where good intentions are not enough to mask federalist logic and a dangerous lack of realism.
Even potential victories in football cannot mask the reality of the situation.
A harmonious society is not simply the same as masking authoritarian relations.
A new ideology will rise up under a mask of tolerance.
Convergence between countries often masks deepening differences between regions and within them.