The phrase "brake one's heart" implies causing great sadness, disappointment, or pain to someone. The antonyms of this phrase are words that convey the opposite meaning. Some of these antonyms include "mend an heart," "brighten one's day," "make someone happy," "comfort one's soul," and "bring joy to someone's heart." These words and phrases signify positive emotions and actions that have the ability to uplift someone's spirits and heal emotional wounds. Using these antonyms in communication and behavior can foster meaningful relationships and help us bring positivity to the world around us.