atrabilious (adjective)

1. Sarah's atrabilious mood often overshadowed her romantic dinner dates with Mark.

2. The atrabilious character in the comics always seemed to be in a foul mood, causing trouble for the others.

3. In the fantasy novel, the protagonist's atrabilious temperament hindered his ability to form alliances and fight against the dark forces.

4. The main character in the classic literature book was portrayed as atrabilious, which added depth to his complex personality.