The antonyms for the phrase "made matters up" include honesty, truthfulness, transparency, and authenticity. When a person is honest, they do not invent stories or fabricate facts. They speak truthfully and do not engage in deceit or manipulation. Transparency means being open and forthcoming, sharing information freely and avoiding secrecy or deception. Authenticity speaks to being genuine and sincere, staying true to oneself and not pretending to be something or someone else. All these characteristics are essential for building trust and healthy relationships, whether in personal or professional settings. Therefore, avoiding "making matters up" and embracing these antonyms can lead to greater success and fulfillment.