morosity
/məˈrɒsɪti/noun
The state or quality of being morose; morose character or disposition. Formerly also (chiefly in the 17th cent.): †an instance of moroseness (obsolete ).
Origin
Mid 16th century. From Middle French, French morosité moroseness, an instance of this and its etymon classical Latin mōrōsitās moroseness from mōrōsus + -tās.