rope-ladder

n ladder made of two long ropes connected by short cross-pieces 绳梯.

rookie, room, room service, room-mate, roomer, roomful, roominess, rooming-house, roomy, roost, rooster, root, root beer, root vegetable, root-crop, rooted, rootless, rootlessness, rope, rope ladder, ropiness, ropy (also ropey), Roquefort, roro, rosary, rose, rose-bud, rose-hip, rose-water, rose-window, roseate, rosebay, rosebush, rosemary, rosette, rosewood, rosin, rosiness, roster, rostrum,