Blacken \Black"en\, v. t. [imp. & p. p. {Blackened}; p. pr. & vb. n. {Blackening}.] [See {Black}, a., and cf. {Black}, v. t. ] 1. To make or render black.
While the long funerals blacken all the way. --Pope.
2. To make dark; to darken; to cloud. ``Blackened the whole heavens.'' --South.
3. To defame; to sully, as reputation; to make infamous; as, vice blackens the character.
Syn: To denigrate; defame; vilify; slander; calumniate; traduce; malign; asperse.
Blacken \Black"en\, v. i. To grow black or dark.
Those who saw the Santa Barbara oil spill blacken California's coast with sticky goo two decades ago still have a residue of bitterness, environmental activism, and mistrust of business and government.
It also was highly unusual for the normally discreet Fed to blacken Bankers Trust's eye in public.
The shocking jump of the consumer price index in the first three months helped to blacken the mood.
It could blacken beaches around Agadir, one of the most popular resorts in Morocco.