The antonyms for the word "more sylphlike" would be "less graceful", "clumsy", "heavyset", or "bulkier". Sylphlike is a term that is used to describe a person who is slim, graceful, and delicate. On the other hand, if someone is less sylphlike, they may be described as having a heavier build, being less graceful in movement, or appearing more clumsy. It is important to note that everyone has their unique body type, and there should be no judgment placed on someone's appearance based on societal beauty standards. It is always essential to celebrate and embrace our individuality and be comfortable in our skin.