·noun A small wheel or caster.
II. Truckle ·vt To roll or move upon truckles, or casters; to Trundle.
III. Truckle ·vi To yield or bend obsequiously to the will of another; to Submit; to Creep.
A Welsh coracle. ...
The Sailor's Word-Book
·noun A low bed on wheels, that may be pushed under another bed; a trundle-bed. ...
Webster's Dictionary of the English Language