In a slanderous manner; in a manner that causes slander; in a false and defamatory way.(adverb)
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Use "slanderously" in a sentence
"Others have also questioned whether overzealous activists risk slanderously and erroneously accusing people of fraud because of missing or misprinted military documents."
"Finally, I've decided that if pro-life people are allowed to slanderously refer to pro-choice individuals as "pro-death" or "pro-abortion", then we should get to refer to you as "pro-unwanted children" and "pro-poverty"."
"If “evolutionists” really did find no value in life, as creationists slanderously claim, why on earth would evolutionists bother to study life, let alone find enough interest get a tattoo the family tree of a taxon of finches?"