英语词源字典 - 在线词源网站

brassiere (n.)[brassiere 词源字典]: 18c., "woman's underbodice," from French brassière "child's chemise; shoulder strap" (17c.), from Old French braciere "arm guard" (14c.), from bras "an arm," from Latin bracchium (see brace (n.)). Modern use is a euphemistic borrowing employed in the garment trade by 1902.[brassiere etymology, brassiere origin, 英语词源]
hobby (n.): late 13c., hobyn, "small horse, pony," later "mock horse used in the morris dance," and c. 1550 "child's toy riding horse," which led to hobby-horse in a transferred sense of "favorite pastime or avocation," first recorded 1670s, shortened to hobby by 1816. The connecting notion being "activity that doesn't go anywhere." Probably originally a proper name for a horse (see dobbin), a diminutive of Robert or Robin. The original hobbyhorse was a "Tourney Horse," a wooden or basketwork frame worn around the waist and held on with shoulder straps, with a fake tail and horse head attached, so the wearer appears to be riding a horse. These were part of church and civic celebrations at Midsummer and New Year's throughout England.
Sam Browne: type of belt with shoulder strap, 1915, from Sir Samuel James Browne (1824-1901), British general who invented it.