backwater

n.回水河汊

backpack, backpacker, backpacking, backrest, backscratcher, backset, backside, backslide, backsliding, backspace, backstage, backstroke, backtrack, backup, backward, backward(s), backwardness, backwards, backwards (also backward), backwash, backwoods, backwoodsman, backyard, bacon, bacteria, bacterial, bactericidal, bacteriologist, bacteriology, bacterium, bad, bad debt, bad lands, bad language, bad-mouth, bad-tempered, baddy, bade, badge, badger,