The antonym for the word "more gracile" would be "less delicate" or "less graceful". In other words, if something is not more gracile, it would mean that it is not as elegant, slender, or refined. The antonyms could also include "heavier", "clunkier", "bulkier", or "sturdier", which would imply that something is more solid and less fragile. It is important to note that antonyms provide us with the opposite meaning of a particular word, and they help us to understand and differentiate between concepts. In this case, the antonyms for "more gracile" give us an idea of what is not delicate, slim, or graceful.