$MASKS

A mask is an object or covering worn over the face or head to:

1. Conceal one's identity or protect one's face.
2. Filter the air breathed in, as a dust mask or gas mask.
3. Provide oxygen, as an oxygen mask.
4. Apply pressure or deliver medication, as a ventilator mask.
5. Represent a character or disguise oneself, as a theatrical mask.
6. Symbolize a hidden aspect of oneself, as a figurative mask.

 sense, a mask can also refer to a false appearance or pretense, hiding one's true feelings or intentions.

Mathematician with passion in learning and Tech exploration