The phrase "more wound up" implies a state of high excitement or agitation. Some antonyms that could be used to describe the opposite state could include "calm", "relaxed", "serene", "mellow", "peaceful", "tranquil", "composed", "unwound", "laid-back", or "chilled-out". Often, individuals who are "more wound up" may benefit from taking a break, practicing mindfulness or meditation, engaging in light exercise, or simply spending time in a soothing environment. Learning to identify and manage one's emotions can create a more balanced and healthy outlook on life.