To speak badly of an absent individual.
To attack from behind or when out of earshot with spiteful or defamatory remarks.
To make spiteful slanderous or defamatory statements about someone.
One who engages in backbiting; a backbiter.
To lose its lustre or attraction; to become dull.
To compromise, damage, soil, or sully.
To oxidize or discolor due to oxidation.
Oxidation or discoloration, especially of a decorative metal exposed to air.