sourness β having an acid taste, resembling that of vinegar, lemon juice, etc.; tart.
stew β to cook (food) by simmering or slow boiling.
sullenness β showing irritation or ill humor by a gloomy silence or reserve.
surliness β churlishly rude or bad-tempered: a surly waiter. Synonyms: sullen, uncivil, brusque, irascible, splenetic, choleric, cross; grumpy, grouchy, crabby.
tartness β sharp to the taste; sour or acid: Tart apples are best for pie. Synonyms: astringent, acrid, piquant. Antonyms: sweet, sugary, bland, mellow.
hot-headed β hot or fiery in spirit or temper; impetuous; rash: Hotheaded people shouldn't drive cars.
short fuse β a quick temper: A person with a short fuse has to be handled diplomatically.
slow burn β a gradual building up of anger, as opposed to an immediate outburst: I did a slow burn as the conversation progressed.
gloominess β dark or dim; deeply shaded: gloomy skies.
glumness β sullenly or silently gloomy; dejected.
temper β a particular state of mind or feelings.
spleen β a highly vascular, glandular, ductless organ, situated in humans at the cardiac end of the stomach, serving chiefly in the formation of mature lymphocytes, in the destruction of worn-out red blood cells, and as a reservoir for blood.