Unmask \Un*mask"\, v. i.
   To put off a mask. --Shak.
   
[1913 Webster]

Unmask \Un*mask"\, v. t. [1st pref. un- + mask.]
   To strip of a mask or disguise; to lay open; to expose.
   
[1913 Webster]

unmask
     v 1: reveal the true nature of; "The journal article unmasked the
          corrupt politician" [syn: {uncloak}]
     2: take the mask of; "unmask the imposter" [ant: {mask}]

37 Moby Thesaurus words for "unmask":
   bare, break the seal, bring to light, debunk, develop, disclose,
   discover, dismask, draw the veil, expose, impart, lay bare,
   lay open, let daylight in, let out, manifest, open, open up,
   raise the curtain, reveal, show, show up, strip bare, uncloak,
   uncover, undrape, undress, unfold, unfurl, unkennel, unpack,
   unroll, unscreen, unsheathe, unshroud, unveil, unwrap