to brood is a form of:

Brood



noun
1.
(the young birds: or other animals produced at one hatching or birth, the children in a family, a group of a particular kind) ពងឬកូនមួយសំបុក, ហ្វូងសត្វដែលហើរជាមួយគ្នា large brood កូនសត្វតូចដែលកើត ឬញាស់នៅពេលជាមួយគ្នា
ENGLISH MEANING
noun
1.
The young birds hatched at one time; a hatch; as, a brood of chickens.
2.
The young from the same dam, whether produced at the same time or not; young children of the same mother, especially if nearly of the same age; offspring; progeny; as, a woman with a brood of children.
adjective
1.
Sitting or inclined to sit on eggs.
2.
Kept for breeding from; as, a brood mare; brood stock; having young; as, a brood sow.
verb
1.
(INTRANSITIVE) To sit on and cover eggs, as a fowl, for the purpose of warming them and hatching the young; or to sit over and cover young, as a hen her chickens, in order to warm and protect them; hence, to sit quietly, as if brooding.
2.
(INTRANSITIVE) To have the mind dwell continuously or moodily on a subject; to think long and anxiously; to be in a state of gloomy, serious thought; -- usually followed by over or on; as, to brood over misfortunes.
3.
(TRANSITIVE) To sit over, cover, and cherish; as, a hen broods her chickens.
4.
(TRANSITIVE) To cherish with care.
5.
(TRANSITIVE) To think anxiously or moodily upon.
6.
(TRANSITIVE) That which is bred or produced; breed; species.
7.
(TRANSITIVE) Heavy waste in tin and copper ores.