Breed
Old English brēdan ‘produce (offspring), bear (a child)’, of Germanic origin; related to German brüten, also to brood.
wiktionary
From Middle English breden, from Old English brēdan, from Proto-Germanic *brōdijaną(“to brood”), from Proto-Indo-European *bʰreh₁-(“warm”). Cognate with Scots brede, breid, Saterland Frisian briede, West Frisian briede, Dutch broeden, German Low German bröden, German brüten.
etymonline
breed (v.)
Old English bredan "bring (young) to birth, procreate," also "cherish, keep warm," from West Germanic *brodjan (source also of Old High German bruoten, German brüten "to brood, hatch"), from *brod- "fetus, hatchling," from PIE root *bhreu- "to boil, bubble, effervesce, burn." The etymological notion is incubation, warming to hatch.
Intransitive sense "come into being" is from c. 1200; that of "beget or bear offspring" is from mid-13c. Of livestock, etc., "procure by the mating of parents and rear for use," mid-14c. Sense of "grow up, be reared" (in a clan, etc.) is late 14c.; meaning "form by education" is from mid-15c. Related: Bred; breeding.
breed (n.)
"race, lineage, stock from the same parentage" (originally of animals), 1550s, from breed (v.). Of persons, from 1590s. Meaning "kind, species" is from 1580s.
