To speak irreverently about sacred things

To speak evil of; slander

बुरा बोलना; कलंक लगाना

English Usage: During the argument, he blasphemed about the other person's character.

Hindi Usage: बहस के दौरान, उसने दूसरे व्यक्ति के चरित्र के बारे में बुरा कहा।