'Blacken' definitions:

Make or become black; "The smoke blackened the ceiling"; "The ceiling blackened" [syn: blacken, melanize, melanise, nigrify, black] [ant: white, whiten]

Burn slightly and superficially so as to affect color; "The cook blackened the chicken breast"; "The fire charred the ceiling above the mantelpiece"; "the flames scorched the ceiling" [syn: char, blacken, sear, scorch]