sefþvengrnafnorðkarlkynsef-þvengrm., poët. a ‘sedge-thong,’ snake, Lex. Poët.Skammstafanir og tilvitnanirm.karlkyn (e. masculine)poët.poetically.Lex. Poët.Lexicon Poëticum by Sveinbjörn Egilsson, 1860.