(past & past part. calumniated; pres. part. calumniating)
1.
Charge falsely or with malicious intent; attack the good name and reputation of someone. Synonyms:asperse, besmirch, defame, denigrate, slander, smear, smirch, sully."The article in the paper sullied my reputation"
... reproach, but the reason of this their ungodly practice is this, they fear not God. For did they fear him, they would be afraid to so much as think, much more of attempting to afflict and destroy, and calumniate the children of God; but such there have been, such there are, and such there will be in the world, for all ... — The Works of John Bunyan • John Bunyan