Big-headedness is often described as an inflated sense of self-importance or arrogance. Its antonyms could be modesty, humility, or self-deprecation. Modesty is the quality of being unassuming or humble, while humility is the state of acknowledging one's limitations and imperfections. Self-deprecation is the act of being overly critical of oneself, which can be seen as a counterbalance to big-headedness. Other antonyms of big-headedness include meekness, submissiveness, diffidence, or unpretentiousness. These opposing traits all share the common thread of downplaying one's own significance or achievements, which stands in stark contrast to the egotistical tendencies of big-headedness.