Brood is a verb that means to think about something at length, especially in a troubled, resentful, or morbid way.
To think about something at length, especially in a troubled, resentful, or morbid way.
This introspective sense is less common in everyday speech but remains established in literary and formal writing.
Brood is a verb.
Brood has high GRE relevance.
dwell , mull , obsess , ruminate