falseface
/ˈfɔːlsˌfeɪs/
noun
- A mask or disguise worn to hide one's true identity or intentions.
- In the carnival, everyone wore a falseface, making it impossible to tell who was who.
- The spy wore a falseface to enter the enemy camp unnoticed.
- He put on a falseface of friendliness, but his real motives were selfish.