rotter

n (sl joc 俚, 谑) nasty or worthless person 可恶的人; 无赖: He's a complete rotter! 他是个十足的大坏蛋!

rosin, rosiness, roster, rostrum, rosy, rot, rot-gut, rota, rotary, rotate, rotation, rotational, rotatory, rote, rote learning, rotisserie, rotor, rotten, rottenly, rottenness, rotund, rotunda, rotundity, rotundly, rouble (also ruble), roue, rouge, rough, rough house, rough luck, rough-and-tumble, rough-hewn, roughage, roughcast, roughen, roughly, roughneck, roughness, roughshod, roulette,