to detract, as from authority, estimation, etc. (usually fol. by from ).

to stray in character or conduct; degenerate (usually fol. by from ).

to disparage or belittle.

Archaic . to take away (a part) so as to impair the whole.

Archaic . debased.

verb

disparage , discredit , detract , humiliate , insult , slander , denigrate , decry , deprecate , depreciate , discount , downgrade , minimize , run down , slight , talk down