rider n.骑马的人;乘车的人
ridge n.脊;岭，山脉;垄
ridiculous a.荒谬的，可笑的
rifle n.步枪，来复枪
right a.正确的 ad.对，正好
rigid a.刚硬的;僵硬的
ring n.环形物(如圈、环等)
ring vi.鸣;按铃 n.铃声
ripe a.熟的;时机成熟的
ripen vt.使熟 vi.成熟
rise vi.起立;升起;上涨
risk n.风险，危险，冒险
rival n.竞争者 a.竞争的
river n.江，河，水道
road n.路，道路，公路
roar vi.吼叫;呼喊 n.吼
roast vt. &vi.烤，炙，烘
rob vt. &vi.抢劫;劫掠
robber n.强盗，盗贼
robbery n.抢劫，劫掠，盗取
robe n.长袍，长衣，浴衣
robot n.机器人;自动机
rock vt.摇，使动摇 vi.摇
rock n.岩，岩石;石头
rocket n.火箭，火箭发动机
rod n.杆，竿，棒
role n.角色，作用，任务
roll vi.&vt.滚动;转动
roller n.滚柱，滚筒，滚轴
Roman n.古罗马人 a.罗马的
romantic a.浪漫的;传奇的
roof n.屋顶，车顶;顶
room n.房间;地位;余地
root n.根，根子 vi.生根
rope n.绳，索
rose n.蔷薇花，蔷薇科植物
rot vt.烂，腐坏 n.腐烂
rotary a.旋转的，转动的
rotate vi.旋转 vt.使旋转
rotation n.旋转，转动;循环
rotten a.腐烂的，发臭的
rough a.表面不平的;粗略的
roughly ad.粗糙地，粗略地
round a.圆的 n.兜圈;一轮
rouse vt.唤醒，唤起;惊起
route n.路，路线，路程
routine n.例行公事 a.日常的
row n.(一)排，(一)行
row vt.划(船等) vi.划船
royal a.王的;皇家的
rub vt.摩擦，擦 vi.摩擦
rubber n.橡皮(擦子);橡胶
rubbish n.垃圾，废物;废话
rude a.加工粗糙的;粗野的
rug n.小地毯;毛毯
ruin n.毁灭;废墟 vt.毁坏
rule n.统治;规定;习惯
ruler n.统治者;尺，直尺
rumour n.谣言，谣传，传闻
run vi.跑，奔;行驶;流
runner n.赛跑的人
rural a.农村的，田园的
rush vi.冲，奔 vt.催促
Russian a.俄罗斯的 n.俄国人
rust n.锈 vi.生锈，氧化
rusty a.生锈的;变迟钝的
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