soot
1. soot \'su.t, 's*t, 'su:t\ n [ME, fr. OE so-t; akin to OIr su-ide soot, OE sittan to] sit : a black substance formed by combustion, rising in fine particles, and ad hering to the sides of the chimney or pipe conveying the smoke; esp : the fine powder consisting chiefly of carbon that colors smoke 2. soot vt : to coat or cover with soot