Word Origin & History
broodO.E. brod "brood, fetus, hatchling," from P.Gmc. *brod (cf. M.Du. broet, O.H.G. bruot, Ger. Brut "brood"), lit. "that which is hatched by heat," from *bro- "to warm, heat," from PIE *bhre- "burn, heat, incubate," from base *bhreue- "to boil, bubble, effervesce, burn" (see
brew). The verbal figurative meaning ("to incubate in the mind") is first recorded 1570s, from notion of "nursing" one's anger, resentment, etc. Related: Brooded.