blain (n.)youdaoicibaDictYouDict[blain 词源字典]
Old English blegen "a sore," from Proto-Germanic *blajinon "a swelling" (cognates: Danish blegn, Dutch blein), from PIE *bhlei- "to swell," from root *bhel- (2) "to blow, inflate, swell;" see bole.[blain etymology, blain origin, 英语词源]