The right answer for the question that is being asked and shown above is that: "<span>"Ah! Cornelius Agrippa! It is even possible that the train of my ideas would never have received the fatal impulse that led to my ruin. I read and studied the wild fancies of these writers with delight; "</span>
Do you mean lackluster?
if that is the word then the root word would be luster and the affecting word be lack because you would be lacking luster. does this help?:)