The antonyms for the word "most swollenheaded" are modest, humble, and unpretentious. Someone who is modest doesn't boast about their achievements, skills, or talents. They are confident, yet they don't seek attention or recognition. A humble person is aware of their limitations and shortcomings, and they don't consider themselves superior to others. They show respect and gratitude towards others, regardless of their position or status. An unpretentious person doesn't behave in an arrogant or egotistical manner. They are authentic, genuine, and approachable, and they don't put on airs or affectations. In short, being modest, humble, and unpretentious are virtues that make people more likable, respected, and admired.