DENIGRATED

Verb

denigrated

simple past tense and past participle of denigrate

Source: Wiktionary

DENIGRATE

Den"i*grate, v. t. Etym: [L. denigrare; de- + nigrare to blacken, niger black.]

1. To blacken thoroughly; to make very black. Boyle.

2. Fig.: To blacken or sully; to defame. [R.] To denigrate the memory of Voltaire. Morley.

Source: Webster’s Unabridged Dictionary 1913 Edition