Untroubled is an adjective often used to describe a situation or someone who is not experiencing any difficulties or worries. Some synonyms for untroubled include calm, peaceful, serene, placid, and tranquil. Other variations of untroubled might include undisturbed, unruffled, or unperturbed. These words can be used to describe a range of situations, from a quiet and serene ocean to a person who is not frazzled by a stressful situation. Other synonyms for "untroubled" might include carefree, relaxed, easygoing, or unencumbered. All of these words convey a sense of ease and a lack of worry or stress.