One who contemns, who displays contempt towards another.(noun)
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Use "contemner" in a sentence
"If Caleb could have concentrated all the lightnings of aristocracy in his eye, to have struck dead this contemner of allegiance and privilege, he would have launched them at his head, without respect to the consequences."
"Louis XI, an habitual derider of whatever did not promise real power or substantial advantage, was in especial a professed contemner of heralds and heraldry, “red, blue, and green, with all their trumpery,” to which the pride of his rival Charles, which was of a very different kind, attached no small degree of ceremonious importance."
"“Alas! how soon our best resolutions pass away! — he was in a blessed frame for departure but now, and in two minutes he has become a contemner of authorities.”"