halo-youdaoicibaDictYouDict[halo- 词源字典]
before vowels hal-, word-forming element meaning "salt, sea," from Greek hals (genitive halos) "a lump of salt, salt generally," in Homer, "the sea," from PIE *sal- (1) "salt" (see salt (n.)).[halo- etymology, halo- origin, 英语词源]