Grendel is related to a monster, because he sounds like a monster. "His meal taking finished" making him sound like a monster eating. "Morning cry mighty" describes the characteristics of a monster.
One of my greatest pet peeve is when people chew with their mouth open I hate this because I can hear the mouth sound and it is something I hate I went out with my friends once and the person next to me was chewing on gum and they were smacking like really hard and it made me so uncomfortable and mad.
