Unmask \Un*mask"\, v. i. To put off a mask. --Shak.
Unmask \Un*mask"\, v. t. [1st pref. un- + mask.] To strip of a mask or disguise; to lay open; to expose.
There had been no terrorist conspiracy. Yet the RUC seemed unembarrassed by its own use of emergency legislation in the PTA to unmask the supposed hoaxer.