Sentence:  "Lokasenna", stanzas 37-40, comprise an exchange between Týr and Loki. Loki boasts that <WSD>Fenrir</WSD> tore off Týr's arm; Týr responds that although he may be missing his hand, Loki is missing Hródrsvitnir, that is, the famous wolf, <WSD>Fenrir</WSD>. 
Meaning of the word marked with <WSD> tags:  A monstrous wolf, one of Loki's offspring, who bites off Tyr's right hand while being bound by the gods in fear of a prophecy that he will kill Odin, remaining so bound until the events of Ragnarok.