unmasked

WordReference Random House Learner's Dictionary of American English © 2025

un•mask /ʌnˈmæsk/   v. 

1. to take off a mask or disguise (from): [~ + object]
   He unmasked her at the costume party.
   [no object]
   All the guests eventually unmasked.
2. to reveal the true character of;
   disclose;
   expose:
   [~ + object (+ as + object)] He was unmasked as the killer.

WordReference Random House Unabridged Dictionary of American English © 2025

un•mask  (un mask′, -mäsk′), v.t. 

1. to strip a mask or disguise from.
2. to reveal the true character of;
   disclose;
   expose.
3. Military to reveal the presence of (guns) by firing.

v.i. 

4. to put off one's mask;
   appear in true nature.

• un-² + mask 1580–90

un•mask′er, n. 

Collins Concise English Dictionary © HarperCollins Publishers::

unmask / ʌnˈmɑːsk/ verb

1. to remove (the mask or disguise) from (someone or oneself)
2. to appear or cause to appear in true character

unˈmasker noun