bur (also burr)

n (plant with a) prickly seed-case or flower-head that clings to hair or clothing 刺蒺藜（易附著於毛发或衣服上）: (fig 比喻) She tried to get rid of him at the party but he stuck to her like a bur. 在宴会上她尽力摆脱他, 可他却像刺蒺藜一样钩住她不放.

bun-fight, bunch, bundle, bung, bung-hole, bungalow, bungle, bungler, bungling, bunion, bunk, bunker, bunkum, bunny, Bunsen burner, bunting, buoy, buoyancy, buoyant, buoyantly, burble, burden, burdensome, bureau, bureaucracy, bureaucrat, bureaucratic, bureaucratically, burette, burgeon, burger, burgh, burgher, burglar, burglar-alarm, burglar-proof, burglary, burgle, burgomaster, Burgundy,