unmasque

Verb

unmask (third-person singular simple present unmasks, present participle unmasking, simple past and past participle unmasked)

1. (transitive) To remove a mask from someone.
2. (transitive) To expose, or reveal the true character of someone.
   • The Charieſt maide is prodigall enough, / If ſhe vnmaske hir beautie to the Moone.c. 1599–1602 (date written), William Shake-speare, The Tragicall Historie of Hamlet, Prince of Denmarke: […] (First Quarto), London: […] [Valentine Simmes] for N[icholas] L[ing] and Iohn Trundell...
3. (intransitive) To remove one's mask.
   • But instead of a direct answer to so important a question, Jones began to be very importunate with the lady to unmask; and at length having prevailed, there appeared not Mrs Fitzpatrick, but the Lady Bellaston herself.1749, Henry Fielding, The History of Tom Jones, a Foundling
4. (intransitive) To cease engaging in masking, to cease disguising one's autism.
   • […] to unmask and to assume her 'natural' role (rather than her 'fitting in' role).2019, Sarah Cobbe, Simple Autism Strategies for Home and School: Practical Tips, Resources and Poetry, Jessica Kingsley Publishers, →ISBN, page 49
5. (dated, transitive) To expose something that was concealed or shielded from an enemy.
   • He recalled his horse. This, retiring, unmasked the heavy infantry, which Hannibal called in from either flank and sent with a vigorous élan in close column across the ford against the ill-arrayed barbarians, followed by the cavalry, which had formed again in its rear.1893, Theodore Ayrault Dodge, Hannibal: a History of the Art of War Among the Carthaginians and Romans […] , page 156
6. (transitive) To enable (an interrupt, etc.) by unsetting or setting the associated bit.