roach

n (pl ~es) (esp US) 1 (infml 口) = cock-roach. 2 (sl 俚) stub of a marijuana cigarette 大麻卷烟的烟蒂.

rival, rivalry, rive, riven, river, river bed, river-bed, riverside, rivet, riveter, riveting, Riviera, rivulet, riyal, rly, RM, RN, RNA, RNIB, RNLI, road, road safety, road sense, road show, road tax, road test, road to, road-block, road-hog, road-house, road-mender, road-metal (also metal), road-works, roadblock, roadie, roadrunner, roadside, roadway, roadworthiness, roadworthy,