roach
noun [ C ] uk/rəʊtʃ/ us/roʊtʃ/
(FISH)
plural roach（产于欧洲的）斜齿鳊，拟鲤
a European fish that lives in fresh water
(INSECT)
US plural roaches蟑螂（cockroach的非正式说法）
informal for cockroach
(CIGARETTE)
slang plural roaches（大麻烟卷的）烟蒂
a piece of card or other material used to make the end part of a joint (= cannabis cigarette) or roll-up (= hand-made cigarette), that the smoke is breathed through