Simple past tense and past participle of demean.(verb)
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Use "demeaned" in a sentence
"And interestingly, as usual, it is the Bible based, Evangelistic, GOP, Republican Right who have once again demeaned our President!"
"Frances Crook, head of the Howard League for Penal Reform, said the phrase demeaned criminals and hindered their rehabilitation."
"Satan retreated, hid himself, surreptitiously arose again, awaited his chance, taking advantage of unguarded and weak moments, and in one word demeaned himself as a very live and sagacious Satan."