Brood
Part of speech: verb
Definition: To keep an egg warm to make it hatch. To protect. To dwell upon moodily and at length.
Part of speech: noun
Definition: The young of certain animals, especially a group of young birds or fowl hatched at one time by the same mother. The young of any egg-laying creature, especially if produced at the same time. The children in one family.
Example sentence: Some divorcees turn their pain inward. They brood, and they grieve for a long time, always wondering if they could have done something differently to keep this from happening. They make every problem in their relationship into something they could have prevented.
Sulk
Part of speech: verb
Definition: to express ill humor or offense by remaining sullenly silent or withdrawn.
Part of speech: noun
Definition: a state of sulking.