atrabilious /ˌæ.tɹəˈbɪl.i.əs/ adjective3 •Characterized by melancholy.But the torch of taste has for the moment fallen into the hands of little men, anaemic and atrabilious, with neither laughter nor pity in their hearts. — 1896 •Ill-natured; malevolent; cantankerous.Fen was in an atrabilious mood. "You've been the devil of a time," he grumbled as Lily Christine III got under way again. — 1946 •(no longer used) Having an excess of black bile.[I] could see nothing in the evidence which did persuade me to think them other than poor, melancholy, envious, mischievous, ill-disposed, ill-dieted, atrabilious constitutions. — 1645 formsmore atrabilious · most atrabilious