Denigration

n.	1.	The act of making black.
	2.	Fig.: A blackening; defamation. The vigorous denigration of science. - Morley.

Noun	1.	denigration - a belittling comment Synonyms: belittling
	2.	denigration - an abusive attack on a person's character or good name Synonyms: aspersion, calumny, defamation, slander
	3.	denigration - the act of expressing disapproval (especially of yourself) Synonyms: deprecation

belittle, belittling, denigrate, depreciation, derogate, derogation, disparagement, minimize