сажаfuligo [inis, f];
мокротаsputum [i, n]
эксплуатироватьfrui [or, fruitus/fructus
graphis, idis [-idos], f; graphium [ii, n] ; scriptorium [ii, n] ; stilus [i, m] plumbeus; plumbum [i, n] ; lapis [idis, m] scriptorius, haematites [ae, m] (Gr); plumbago, inis, f;