adjective
morose
muh-ROHSS/məˈrəʊs/
Unhappy and bad-tempered.
He sits hunched on the bench with a morose expression.

Etymology
The root concerns habits or disposition, but Latin morosus gave it a negative turn: peevish, fastidious, or hypercritical. English preserves that sour disposition in the sense “sullen and ill-tempered.”
In context
leading a solitary morose life, eating and sleeping alone,
More examples
- A morose silence settled over the table.
- She tried to cheer her morose companion.
- The character answers every friendly question with a morose grunt.
Forms
morose · more morose · most morose
morosely adverb — in a gloomy and bad-tempered manner