Hitch is defined as to connect or to move with a jerking motion.(verb)
The definition of a hitch is a something used to connect or an obstacle.(noun)
See hitch in Webster's New World College Dictionary
Origin: ME hicchen, to move jerkily < ?
See hitch in American Heritage Dictionary 4
verb hitched, hitch·ing, hitch·es verb, transitive
Origin: Probably from Middle English hytchen, icchen, to move, jerk.
Learn more about hitch