h₂eḱs-

“axle, axis”

Widely acceptedtechnologyvehicle

Source of Latin axis, English axle, axis

Root for the axle concept, yielding Latin axis and English axle — one of the earliest vehicle terms.

h₂eyos-₂“copper, bronze metal”h₂eḱs-l-“axle, turning rod”kʷel-mn̥“that which revolves, wheel”neh₂-w-mn̥“ship, vessel”