This is the 9995th most frequent Spanish word.
calumniando
Slandering.
In this sentence, 'calumniando' is used to describe the actual act of slandering as it's happening.
Ella está calumniando a su vecino, acusándolo falsamente de robo.
She is slandering her neighbor, falsely accusing him of theft.
Here, 'calumniando' is used to portray the accusation of the act of slandering, giving the context of its occurrence.
El político fue acusado de calumniando a su oponente durante la campaña.
The politician was accused of slandering his opponent during the campaign.
In this case, 'calumniando' is used as a gerund to generalize the act of slander, emphasizing the ethical context.