boreal (adj.)youdaoicibaDictYouDict[boreal 词源字典]
"northern," late 15c., from Latin borealis, from boreas "north wind," from Greek Boreas, name of the god of the north wind, which is of unknown origin, perhaps related to words in Balto-Slavic for "mountain" and "forest."[boreal etymology, boreal origin, 英语词源]