trun·dle /ˈtrʌndḷ/
 小車輪,腳輪,滾動(vi.)滾,推,扔球(vt.)使滾動,使旋轉
 Trun·dle, v. i.
 1. To go or move on small wheels; as, a bed trundles under another.
 2. To roll, or go by revolving, as a hoop.
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 Trun·dle n.
 1. A round body; a little wheel.
 2. A lind of low-wheeled cart; a truck.
 3. A motion as of something moving upon little wheels or rollers; a rolling motion.
 4. Mach. (a) A lantern wheel. See under Lantern. (b) One of the bars of a lantern wheel.
 Trun·dle, v. t. [imp. & p. p. Trundled p. pr. & vb. n. Trundling ]
 1. To roll (a thing) on little wheels; as, to trundle a bed or a gun carriage.
 2. To cause to roll or revolve; to roll along; as, to trundle a hoop or a ball.
 trundle
      n 1: a low bed to be slid under a higher bed [syn: trundle bed,
            truckle bed, truckle]
      2: small wheel or roller
      v : move heavily; "the streetcar trundled down the avenue"