Under-values means to underestimate or disregard the true worth, importance or significance of a person or thing. Its antonyms include overvalue, appreciate, respect, esteem, esteem highly, value, treasure and cherish. By overvaluing something or someone, it means that their worth or significance is overestimated. Appreciating means recognizing the worth or importance of something, showing gratitude, and acknowledging the significance of the person or thing. Valuing and cherishing means holding in high regard and understanding the importance and worth. Respecting and esteeming highly means recognizing the value and importance, showing admiration, and holding in high esteem. Overall, the antonyms for under-value signify understanding, respect, and worthiness.