Artificial intelligent assistant

whiffletree

whiffletree
  U.S. variant of whippletree.

1842 W. P. Hawes Sporting Scenes II. 69 Our whiffle⁓tree became detached from the vehicle, and fell upon the horse's heels. 1855 Bristed in Cambr. Ess. 65 Whiffle-tree, the invariable American for splinter-bar. 1868 Rep. U.S. Comm. Agric. (1869) 256 A boy can lead a horse, with a suitable chain attached to the whiffletree. 1896 Century Mag. Nov. 23 With trace-chains rattling and whiffletrees snapping over the stumps of trees.

Oxford English Dictionary

yu7NTAkq2jTfdvEzudIdQgChiKuccveC 08d1ef3a53feffaf2ebb4299170fedea