He tore his arm off.
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Grendel's defeat at the end of the battle in Beowulf is attributed to Beowulf's strength and skill in combat, as well as the assistance of his warriors. Beowulf's ability to rip off Grendel's arm is a crucial moment in the battle that ultimately leads to Grendel's defeat.
Unferth
Grendel and his mother are both killed by Beowulf in the epic poem "Beowulf." Grendel is killed by Beowulf in Heorot Hall, and later Beowulf ventures to the underwater lair to defeat Grendel's vengeful mother.
While Grendel's mother is hard for Beowulf to defeat, he IS able to use a sword, where as he has to battle Grendel bare handed.
The medieval Danish epic about a brute hero in his quest to defeat Grendel is called "Beowulf." Beowulf is an Old English epic poem that tells the story of the hero Beowulf who embarks on a journey to help King Hrothgar by defeating the monster Grendel.
The external conflict in Beowulf is between the hero Beowulf and the various monsters he faces, such as Grendel, Grendel's mother, and the dragon. Beowulf must defeat these monstrous opponents to protect his people and prove his bravery and strength.
Considering that Beowulf was able to defeat Grendel without any weapons or armor, Beowulf is much stronger. He ripped Grendel's arm off in the fight and Grendel fled.Also, Beowulf was very young at the time.
While Grendel's mother is hard for Beowulf to defeat, he IS able to use a sword, where as he has to battle Grendel bare handed.
No one else was able to defeat Grendel because he was protected by a magical charm that made him impervious to weapons from humans. Beowulf was able to defeat Grendel because he fought him with his bare hands, which allowed him to overcome the monster's defenses.
Beowulf brings back the head of Grendel and the hilt of the magical sword used to defeat Grendel's mother.
The creature Grendel is the one who taunts Beowulf and the warriors in Herot. Grendel terrorizes the mead hall and its inhabitants, causing fear and destruction until Beowulf arrives to defeat him.