ruminate

v. 反刍，再嚼，深思

Rugby, Rugby League, Rugby Union, rugged, ruggedly, ruggedness, rugger, ruin, ruination, ruined, ruinous, rule, ruler, ruling, rum, rumba, rumble, rumbling, rumbustious, ruminant, rumination, ruminative, ruminatively, rummage, rummage sale, rummy, rumor, rumour, rumour (US rumor), rumoured (US rumored), rump, rumple, rumpus, rumpus room, run, run (sth) down, run (sth) off, run across, run across (into) sb.(sth.), run after,