crowbar (n.)youdaoicibaDictYouDict[crowbar 词源字典]
1748, with bar (n.1), earlier simply crow (c. 1400); so called from its "beak" or from resemblance to a crow's foot; or possibly it is from crows, from Old French cros, plural of croc "hook."[crowbar etymology, crowbar origin, 英语词源]