rough luck

bad luck, worse than is deserved （不该有的）坏运气.

rotation, rotational, rotatory, rote, rote learning, rotisserie, rotor, rotten, rottenly, rottenness, rotter, rotund, rotunda, rotundity, rotundly, rouble (also ruble), roue, rouge, rough, rough house, rough-and-tumble, rough-hewn, roughage, roughcast, roughen, roughly, roughneck, roughness, roughshod, roulette, round, round and round, round brackets, round off, round robin, round trip, round up, round-eyed, round-shouldered, round-table,