Answer: ebonize

AnswerCrossword Clue
EBONIZEBlacken, in a way
EBONIZEStain black
EBONIZEBlacken.
EBONIZEStain black.
EBONIZEBlacken
ebonizeto stain or finish black in imitation of ebony
ebonizeto stain black in imitation of ebony, also EBONISE