Dis-composure is a word that refers to a state of being upset or unsettled. Antonyms for dis-composure include serenity, calmness, and composure. Serenity is a state of being tranquil and peaceful, with a sense of calm that comes from inner peace. Calmness refers to a state of being free from emotional disturbance or agitation, characterized by a feeling of tranquility and peacefulness. Composure is the state of being calm and collected, where one is able to keep their emotions under control. All of these antonyms describe a state of mind that is the opposite of dis-composure, and can help one to achieve a more peaceful and balanced state of being.