Antonyms, or words that have opposite meanings, for the phrase "more exceedingly" could include "less moderate", "less intense", "less severe", or "less extreme". These antonyms indicate a lower degree or intensity of a particular quality or action. For example, instead of saying "he was more exceedingly angry than before," one could use the antonym and say "he was less moderate in his anger than before." It is important to have a good understanding of antonyms to correctly convey the intended meaning of a sentence, and using the right antonym can make a big difference in how a message is received.