The antonyms of underemphasize are overemphasize, exaggerate, overestimate, magnify, overstate, amplify, focus too much on, emphasize too much, and blow out of proportion. All of these words mean to give too much importance to something. For example, when someone overemphasizes something, they give it more importance than it deserves, which can lead to misunderstandings and confusion. To avoid such situations, it is essential to strike a balance and not underemphasize or overemphasize things. One should strive for objectivity and provide accurate information without any bias or undue emphasis.