bootyoudaoicibaDictYouDict
boot: [14] Boot is a comparatively late acquisition by English. It came, either directly or via Old Norse bóti, from Old French bote, whose source is unknown. The modern British sense ‘car’s luggage compartment’ goes back to a 17thcentury term for an outside compartment for attendants on a coach, which may have come directly from modern French botte. The boot of ‘to boot’ is a completely different word. It comes from Old English bōt ‘advantage, remedy’, which can be traced back to a prehistoric Germanic base *bat-, source also of better and best.
=> best, better
trunk (n.1)youdaoicibaDictYouDict
mid-15c., "box, case," from Old French tronc "alms box in a church," also "trunk of a tree, trunk of the human body, wooden block" (12c.), from Latin truncus "trunk of a tree, trunk of the body," of uncertain origin, perhaps originally "mutilated, cut off." The meaning "box, case" is likely to be from the notion of the body as the "case" of the organs. English acquired the "main stem of a tree" and "torso of the body" senses from Old French in late 15c. The sense of "luggage compartment of a motor vehicle" is from 1930. Railroad trunk line is attested from 1843; telephone version is from 1889.