ritual

n.仪式,典礼;a.仪式的,典礼的

ripe, ripen, ripeness, riposte, ripple, rise, rise superior to, riser, risible, rising, rising damp, rising fives, risk, riskily, riskiness, risky, risotto, risque, rissole, rite, ritualize, ritzy, rival, rivalry, rive, riven, river, river bed, river-bed, riverside, rivet, riveter, riveting, Riviera, rivulet, riyal, rly, RM, RN, RNA,