The antonyms for the word "more swollen-headed" include modest, humble, self-effacing, unassuming, egoless, and selfless. When we describe someone as "more swollen-headed," we refer to an individual who is excessively proud, overconfident, and arrogantly self-centered. However, when we use antonyms such as modest and humble, we describe someone who is down-to-earth, unpretentious, and not flaunting their achievements or abilities. Being egoless and selfless means that an individual is not driven by their ego and is focused on serving others, rather than their personal interests. Therefore, it is essential to choose the right antonyms to describe someone's personality more accurately.