Source : Webster's Revised Unabridged Dictionary (1913)

Truckle \Truc"kle\, v. i. [From truckle in truckle-bed, in
   allusion to the fact that the truckle-bed on which the pupil
   slept was rolled under the large bed of the master.]
   To yield or bend obsequiously to the will of another; to
   submit; to creep. ``Small, trucking states.'' --Burke.

         Religion itself is forced to truckle to worldly poliey.
                                                  --Norris.

Truckle \Truc"kle\, v. t. [imp. & p. p. {Truckled}; p. pr. & vb.
   n. {Truckling}.]
   To roll or move upon truckles, or casters; to trundle.

Truckle \Truc"kle\, n. [Dim. of truck a wheel; or from the
   kindred L. trochlea a block, sheaf containing one or more
   pulleys. See {Truck} a wheel.]
   A small wheel or caster. --Hudibras.

Source : WordNet®

truckle
     n : a low bed to be slid under a higher bed [syn: {trundle bed},
          {trundle}, {truckle bed}]

truckle
     v 1: yield to out of weakness
     2: try to gain favor by cringing or flattering; "He is always
        kowtowing to his boss" [syn: {fawn}, {toady}, {bootlick},
        {kowtow}, {kotow}, {suck up}]