Antonyms for bigheaded include modest, humble, unassuming, modest, and self-effacing. These words describe individuals who are not absorbed by self-importance or arrogance. Humble people do not see themselves as superior to others and do not seek to put themselves above others. Modest people are not showy or excessively proud of themselves and do not boast about their accomplishments. Self-effacing individuals have a modest opinion of their own worth or importance and do not draw attention to themselves. Ultimately, using antonyms to describe someone as bigheaded helps to convey that they possess qualities such as humility and modesty.