brooding 词源(Etymology) - 优词词源[英文版]

brooding (adj.)[brooding 词源字典]: 1640s, "hovering, overhanging" (as a mother bird does her nest), from present participle of brood (v.); meaning "that dwells moodily" first attested 1818 (in "Frankenstein").[brooding etymology, brooding origin, 英语词源]
brooding (n.): "action of incubating," c. 1400, verbal noun from brood (v.). Figuratively (of weather, etc.) from 1805; of mental fixations by 1873. Related: Broodingly.