The antonyms for "thought no more of" could be "dwelled on," "obsess over," "fret about," "agonized over," or "stressed about." When we say "thought no more of," we mean that we have moved on from something or someone and are no longer giving them any attention or thought. However, the antonyms imply that we are fixated on something or someone, and our thoughts cannot move past them. These antonyms have a negative connotation, as they suggest that our thoughts are consuming and overwhelming us, and we cannot let go. Therefore, it is essential to be mindful of our thoughts and focus on positive things that bring us joy and peace.