burdensome

a. 累赘的,恼人的,艰难的

bung, bung-hole, bungalow, bungle, bungler, bungling, bunion, bunk, bunker, bunkum, bunny, Bunsen burner, bunting, buoy, buoyancy, buoyant, buoyantly, bur (also burr), burble, burden, bureau, bureaucracy, bureaucrat, bureaucratic, bureaucratically, burette, burgeon, burger, burgh, burgher, burglar, burglar-alarm, burglar-proof, burglary, burgle, burgomaster, Burgundy, burial, burial service, burial-ground,