The antonyms for the word "overuses" would be "underuse" or "moderation." If someone overuses something, it means they are using it excessively or more than necessary. Conversely, if someone underuses something, it means they are not using it enough or not to its full potential. Moderation, on the other hand, involves using something in a balanced and appropriate manner, without overusing or underusing it. It is important to find a balance between overusing and underusing things, as both can have negative consequences. Therefore, moderation is the key to a healthy and balanced lifestyle.