How is grendel described?

Grendel, the monstrous antagonist in "Beowulf," is described as a descendant of Cain, embodying darkness and evil. He is depicted as a large, fearsome creature with a fierce, grotesque appearance, characterized by his claws and immense strength. Grendel roams the night, terrorizing the mead hall of Heorot, driven by jealousy and a deep-seated rage against the joy of humans. His presence symbolizes chaos and the threat of destruction to the world of men.