Answer:
"Spawned" is a verb that the author has used to refer to the "derogatory birth of Grendel" in the epic "Beowulf".
Explanation:
The author has used this term because Grendel is a monster who have been born of monsters parentage. Grendel is a descendant Cain, who is a son of Adam and Eve, who killed his brother out of jealousy in Genesis 4.
This use of connotation of using the word "spawned" rather than "born" is that the reader gets the glimpse of Grendel's character, his inhuman and monstrous nature.
By using this word, the author tells its readers that how evil and monstrous Grendel is that even his birth is execrated using the word.