Sentence:  Feared and misunderstood, <WSD>Fenrir</WSD> was the bringer of doom to the gods and was known as "an axe-age, a sword-age, a wind-age, a wolf-age before the wrecking of the world." 
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.