broad
O.E. brad, from P.Gmc. *braithaz (cf. O.Fris. bred, O.N. brei?r, Du. breed, Ger. breit, Goth. brou?s), of unknown origin. Not found outside Gmc. languages. Slang extension to meaning "woman" (1911) may be suggestive of broad hips, but it also may trace to Amer.Eng. abroadwife, for a woman away from her husband, often a slave. Earliest use suggests immorality or coarse, low-class women. Because of this negative association, and the rise of women in athletics, the track and field broad jump was changed to the long jump c. 1967. Broadside (nautical), 1591, "the side of a ship above the water, between the bow and the quarter." Broadcast, originally "scattering seed" (1767), applied to radio waves 1921. Broadsword is O.E. brad swurd. There was a street named Broadway in many towns; the allusive use for "New York theater district" is first recorded 1881.
Online Etymology Dictionary, © 2001 Douglas Harper