The characteristics that does Grendel have that make him particularly terrifying to the Danes is his voice which make jubilant noise.
Grendel, a terrible monster who lives in the swamplands of Hrothgar's kingdom, is angered by the jubilant noise coming from Heorot. Every night, Grendel terrorizes the Danes, murdering them, and thwarting their attempts to defend themselves.
Grendel subjected the Danes to years of terror, peril, and death. A young Geatish warrior by the name of Beowulf eventually learns of Hrothgar's suffering, though.
Beowulf sets sail for Denmark with a small group of soldiers inspired by the challenge and resolved to slay Grendel.
Beowulf agrees to take on Grendel, and Hrothgar, who previously did a great favor for Beowulf's father Ecgtheow, hosts a feast in the warrior's honor.
Unferth, an envious Dane, teases Beowulf and claims that he is not deserving of his fame while the feast is going on.
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