"detraction" in the noun sense
1. detraction, petty criticism
a petty disparagement
the act of discrediting or detracting from someone's reputation (especially by slander
"let it be no detraction from his merits to say he is plainspoken"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License