War·ble, v. t. [imp. & p. p. Warbled p. pr. & vb. n. Warbling ]
  1. To sing in a trilling, quavering, or vibratory manner; to modulate with turns or variations; to trill; as, certain birds are remarkable for warbling their songs.
  2. To utter musically; to modulate; to carol.
     If she be right invoked in warbled song.   --Milton.
     Warbling sweet the nuptial lay.   --Trumbull.
  3. To cause to quaver or vibrate.  “And touch the warbled string.”