Unferth teases Beowulf verbally. He claims that Beowulf lost a swimming competition to Breca, but Beowulf counters by telling the story of how he defeated Breca and many seamonsters. Unferth then...
If you mean why Unferth dislikes Beowulf, that would be your opinion. Although I think he dislikes him because Beowulf is 'good' and has a 'pure' soul. Also, Unferth is the type of character that...