broadside (n.)youdaoicibaDictYouDict[broadside 词源字典]
1590s, "side of a ship" (technically, "the side of a ship above the water, between the bow and the quarter"), from broad (adj.) + side (n.); thus "the artillery on one side of a ship all fired off at once" (1590s, with figurative extensions). Two words until late 18c. Of things other than ships, 1630s. But oldest-recorded sense in English is "sheet of paper printed only on one side" (1570s).[broadside etymology, broadside origin, 英语词源]
broadsword (n.)youdaoicibaDictYouDict
Old English brad swurd, from broad (adj.) + sword.
crossroads (n.)youdaoicibaDictYouDict
1795, in figurative sense of "a turning point, a moment of decision;" from crossroad. In U.S., used for "a crossroads and little more; small, dull town" by 1845.
roadside (n.)youdaoicibaDictYouDict
1744, from road (n.) + side (n.).
roadster (n.)youdaoicibaDictYouDict
"open two-seat automobile," 1908; earlier a light, horse-drawn carriage (1892); a horse for riding (1818); "a ship lying near the shore" (1744), from road (n.) + -ster.