downhill

ad.下坡

Dover, dovetail, dowager, dowdily, dowdiness, dowdy, dowel, down, down draught (US down draft), down with, Down's syndrome, down-and-out, down-hearted, down-market, down-to-earth, downbeat, downcast, downer, downfall, downgrade, Downing Street, download, downplay, downpour, downright, downs, downstairs, downstream, downtown, downtrodden, downward, downward(s), downwards, downwards (also downward), downy, dowry, dowse, dowser, doxology, doyen,