rocking-horse

n wooden horse mounted on rockers or springs so that it can be rocked by a child sitting on it （儿童游戏用的）木马.

robustly, robustness, rock, rock and roll (also ,rock 'n' `roll), rock salmon, rock'n'roll, rock-bottom, rock-cake, rock-climbing, rock-crystal, rock-garden, rock-plant, rock-salt, rock-steady, rocker, rockery, rocket, rocketry, rockiness, rocking-chair (also rocker), rocky, rococo, rod, rode, rodent, rodeo, rodomontade, roe, roebuck, roentgen (also rontgen), Rogation Sunday, rogations, roger, rogue, roguery, rogues' gallery, roguish, roguishly, roguishness, roil,