masca- +

To disguise.

1. Makeup that is used to darken and thicken the eye lashes.
2. A thick colored paste applied to the eyelashes with a fine brush to darken them and to give the appearance of greater length and thickness.

To apply mascara to (the eyes, etc.).

1. A cover or disguise, as for the features; a protective appliance for the face or head; such as a gas mask.
2. A cast of the face taken just after death.
3. A masquerade; also spelled masque.
4. An artistic covering for the face; used by Greek and Roman actors in comedy and tragedy.
5. To put on a mask; to assume a disguise.
6. Etymology: from French masque, Italian maschera, mascara and earlier from Arabic maskharah, a "buffoon" (someone who amuses others by ridiculous behavior).

A heavier mascara formula that builds up a volumizing coat of color on the lashes.