lodestar (n.)youdaoicibaDictYouDict[lodestar 词源字典]
late 14c. (late 13c. as a surname), an old name for the pole star (compare Old Norse leiðarstjarna) as the star that "leads the way" in navigation; from lode (n.) + star (n.). Figurative use from late 14c.[lodestar etymology, lodestar origin, 英语词源]