The antonyms for the word "under play" include "overstate," "emphasize," "exaggerate," "magnify," and "overemphasize." When we underplay something, we downplay its significance or importance. We tend to use a low tone or volume when communicating, and we do not give it the attention it deserves. On the other hand, when we overstate or exaggerate something, we make it seem more significant than it actually is. We emphasize it excessively, and this can lead to confusion or misunderstandings. It is essential to strike a balance when communicating, and using the right antonyms or synonyms can help us achieve this balance.