The phrase "letting have it" generally means to criticize or scold someone harshly. Some of the antonyms for this phrase include praising, complimenting, and applauding. These words reflect positive reactions towards someone instead of negative and could be used to encourage someone. For instance, instead of "letting have it" next time, someone could show approval or appreciation through words of praise. Additionally, words like forgiving or understanding could be used as synonyms-this highlights the importance of being patient and kind to people instead of judging and rebuking them. Ultimately, finding antonyms for "letting have it" creates a chance to communicate positively with people.