Untroubledness is a serene state of being that signifies calmness and peace. Synonyms for this word include peacefulness, tranquility, stillness, quietude, composure, placidity, serenity, equanimity, harmony, repose, and relaxation. Each word carries a slightly different connotation but points to the same fundamental feeling of peace and tranquility. Whether one seeks to describe a calm lake, a peaceful mind, or a carefree day, any of these synonyms can be used to describe the state of untroubledness. In times of stress or turmoil, it can be helpful to focus on these words to invoke a sense of calm and clarity.