The antonyms for the word "dis-simulating" are related to being honest and truthful. Some of the antonyms include truth-telling, candid, transparent, genuine, and sincere. These words indicate being straightforward, revealing information, and expressing oneself truthfully. Unlike dis-simulating, which means to pretend or hide one's true feelings, these antonyms reflect the opposite notion of displaying authentic behavior. People who are truthful and candid in their communication earn respect and trust, and their relationships are built on honesty and integrity. Therefore, some of the antonyms of dis-simulating can be seen as desirable traits to possess in personal and professional settings.