stewing

(noun) an extreme state of worry and agitation. Example: "His stewing over the fight kept him awake most of the night."

(noun) cooking in a liquid that has been brought to a boil. Synonyms: boiling, simmering.

(verb) be in a huff; be silent or sullen. Synonyms: grizzle, brood, stew.

(verb) bear a grudge; harbor ill feelings. Synonyms: stew, grudge.

(verb) cook slowly and for a long time in liquid. Synonyms: stew. Example: "Stew the vegetables in wine."