moped
  機動腳踏兩用車
  Mope v. i. [imp. & p. p. Moped p. pr. & vb. n. Moping.]  To be dull and spiritless; to spend time doing little; as, to mope around the house. “Moping melancholy.”
  A sickly part of one true sense
  Could not so mope.   --Shak.
  moped
       n : a motorbike that can be pedaled or driven by a low-powered
           gasoline engine