Less common but attested transitive/intransitive verb meaning to cook over charcoal, to convert to charcoal, or to draw with charcoal.
carboniserAu sens de transformer en charbon de bois. Traditional kilns were used to charcoal the timber harvested from the forest.
Des fours traditionnels étaient utilisés pour carboniser le bois récolté dans la forêt.
Used attributively/predicatively to denote a dark gray color, e.g. “charcoal trousers”.
She wore a charcoal coat to match her boots.
Elle portait un manteau anthracite assorti à ses bottes.