unmask

verb (used with object)

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.

verb (used without object)

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

verb

1. to remove (the mask or disguise) from (someone or oneself)
2. to appear or cause to appear in true character
3. (tr) military to make evident the presence of (weapons), either by firing or by the removal of camouflage, etc

v.1580s in figurative sense, c.1600 in literal sense, from un- (2) + mask (v.). Related: Unmasked; unmasking.