The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
Appendix I
Indo-European Roots
ENTRY:
gwou-
DEFINITION:
Ox, bull, cow. Nominative singular form *gwu-s. Derivatives include cow1, beef, bugle1, and butter. 1.cow1, kine; cowslip, from Old English c,c,ce, cow, from Germanic *kuz (> *kz). 2a.beef, bovine, bugle1, from Latin bs (stem bov-), ox, bull, cow; b.buccinator, from Latin bcina, horn, trumpet, from *bou-kan-, bellower (*-kan-, singer; see kan-). 3a.Boötes, boustrophedon, bucolic, bugloss, bulimia, bumelia, buprestid, butter, butyric, from Greek bous, ox, bull, cow; b.buffalo, from Greek boubalos, buffalo, perhaps from bous.4.gayal; guar, Gurkha, nilgai, from Sanskrit gau,go-, cow. 5. Suffixed form *gwou-no-.gunny, from Pali goa-, ox. 6. Suffixed form *gwu-ro-.gaur, from Sanskrit gaura, wild ox. 7. Zero-grade suffixed form *gww--.hecatomb, from Greek hekatomb, sacrifice of a hundred oxen (hekaton, hundred; see dek). (Pokorny gou- 482.)