moody
US /ˈmuː.di/
UK /ˈmuː.di/

1.
having moods that change quickly and often
:
•
He's been very moody lately, laughing one minute and angry the next.
•
Her sudden outbursts show how moody she can be.
2.
causing or expressing a particular mood, especially a gloomy or dark one
:
•
The artist is known for his moody landscapes, often featuring dark skies and stormy seas.
•
The lighting in the room created a very moody atmosphere.