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Use "blackguardism" in a sentence
"He described in glowing terms the blackguardism of the would-be bigamist, sitting there in smug complacency by the side of his already one too many wife."
"Page 110 unwilling to quarrel, he probably thought that it was a good opportunity to air the spirit of blackguardism, which is the strongest characteristic of some people, and persisted in following me up."
"They'd have cleared this kind of blackguardism up with a knife."