Sentence:  But according to Lycophron, the last of the Greek poets, Penelope committed adultery with one of the suitors at the persuasion of the aged <WSD>Nauplius</WSD>, who avenged the death of his son Palamedes by enticing almost all the wives of the Greeks into prostitution. 
Meaning of the word marked with <WSD> tags:  A descendant of the founder of Nauplia who ruled the city (alternatively, Euboea), was one of the Argonauts, and was father to Palamedes, who fought in the Trojan War.