Antonyms are words that have opposite meanings. When it comes to the word "super excellent," some antonyms that come to mind are "mediocre," "inferior," and "substandard." Mediocre means average or ordinary, and is the opposite of excellent. Inferior means lower in quality, value or ability, and is also the opposite of excellent. And substandard refers to something that fails to reach a standard or level required by law, and is therefore also the opposite of excellent. These antonyms help to clarify the meaning of "super excellent" by providing contrast and allowing us to better understand what makes something truly excellent.