The phrase "make matters up" refers to fabricating or inventing a story or situation. Some antonyms for this phrase include telling the truth, being authentic, adhering to facts, and reporting accurately. These antonyms emphasize honesty and integrity in communication, as opposed to deception and dishonesty. Other antonyms for "make matters up" might include sticking to the facts, remaining truthful, avoiding falsehoods, and maintaining credibility. In any situation, it is essential to choose language that reflects one's values and commitment to ethical behavior. By using antonyms for "make matters up," individuals can convey their commitment to honesty and transparency in all their interactions.