mask
Definitions
A covering for all or part of the face, worn to conceal one's identity or for protection.
A likeness of a person's face made of plaster, wax, or another material.
To conceal, disguise, or protect something by covering it.
Examples
She wore a decorative mask to the masquerade ball.
The actor used a heavy layer of makeup to mask his true identity.
Please remember to wear a mask when entering the medical clinic.