The word "sub-lime" means something that is of a lower quality than what is expected or a level below excellence. Antonyms for "sub-lime" includes words such as superb, exquisite, first-rate, and extraordinary. These words describe something of exceptional quality and surpassing what is expected. They embody excellence and perfection, completely opposite of the meaning of "sub-lime". Other antonyms for "sub-lime" include superior, magnificent, flawless, and exceptional. These words describe something that is at the highest level of quality, surpassing expectations and exceeding all standards. It's important to know these antonyms to be able to effectively express one's thoughts and impressions.