Strong's H7393רֶכֶב: a vehicle; by implication, a team; by extension, cavalry; by analogy a rider, i.e. the upper millstone KJV:chariot, (upper) millstone, multitude (from the margin), wagon.
Meanings: Brown-Driver-Briggs (1906) and Strong's Hebrew Dictionary (1890), public domain, via the Open Scriptures Hebrew Bible Project (CC BY 4.0). TWOT numbers for reference only.
Root family 2163: רָכַבrākab — mount and ride, ride; mount, mount and sit, be riding, rider; cause to, mount and, cause to draw, cause hand to ride upon, bow; place upon, despatch; carry, get up, on back, put, set