Simple past tense and past participle of unmask.(verb)
Not masked.(adjective)
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Use "unmasked" in a sentence
"In its title the word "unmasked" is purposely provocative and misleading, as is fitting for a book that derives from close reading and a Straussian attention to the arcane."
"Interesting to see political spin unmasked and the rise of bloggers but doubtful it'll change the political landscape much in Norfolk."
"In New Avengers when he unmasked, that is not what happened."