noun
facade
fuh-SAHD/fəˈsɑːd/
A false outward appearance hiding a different reality.
The smiling mask creates a facade over her sorrowful face.

Etymology
A building's front became a figurative outward show that can hide a different reality.
A false outward appearance hiding a different reality.
The smiling mask creates a facade over her sorrowful face.

A building's front became a figurative outward show that can hide a different reality.