The Tocharian B word cākkär
Word cākkär
ʨ a k k ə r
IPA ʨakkər
Meaning wheel
See also Sanskrit: cakrii ‘wheel’
Cappadocian Greek: çακρό ‘wheel’
Greek: κύκλος ‘wheel’
Proto-Indo-European: *kʷekʷlóm ‘wheel’
Avestan: caxra- ‘wheel’

Comments
Douglas Q. Adams, “Etymological Dictionary of Tocharian B”, 1999, Brill

Other words that might be of interest
kokale ‘cart, chariot’, kokaletstse ‘carter, charioteer’