Denigration (noun)

1. The act of speaking ill of or making negative statements about someone or something; defamation.
2. The act of belittling or undervaluing someone or something; depreciation.

Origin:

From the latin word "denigrare" meaning "to blacken".

Examples:

1. The denigration of his character by the media left him feeling defeated.
2. She spoke of the denigration of women in the workplace and how it needed to change.
3. The denigration of his reputation was too much for him to take.
4. Her constant denigration of his abilities was starting to affect his self-esteem.
5. The denigration of the company's products by its competitors was having a negative impact on sales.