moody

Given to frequent changes of mood; temperamental.

Subject to periods of depression; sulky.

Expressive of a mood, especially a sullen or gloomy mood.

Spirited; high-spirited; proud; obstinate.

Angry.

Subject to or indulging in moods or humors; hence, peevish; fretful; out of humor; gloomy; sullen; melancholy.

Corresponding or adapted to moods or varying states of mind.

Subject to varying moods, especially to states of mind which are unamiable or depressed.

Hence: Out of humor; peevish; angry; fretful; also, abstracted and pensive; sad; gloomy; melancholy.

given to sudden or frequent changes of mind; temperamental