barrier

n.栅栏，屏障；障碍(物)

barometer, barometric, baron, baroness, baronet, baronetcy, baronial, baroque, barque, barrack, barrack-, barracking, barracks, barracuda, barrage, barrel, barrel-organ, barren, barrenness, barricade, barrier cream, barrier reef, barring, barrio, barrister, barrow, barrow boy, Bart, bartender, barter, bas-relief, basalt, base, base on (upon), base rate, baseball, baseboard, based on, baseless, baseline,