The antonyms for the words carefree and untroubled would be stressed and anxious. Carefree and untroubled are associated with feelings of relaxation, freedom, and not worrying about anything. However, stressed and anxious are the opposite of these emotions, and they suggest tension, nervousness, and uneasiness. When a person is carefree, they are not worried about their surroundings or future events. Whereas, when an individual is stressed, they experience internal turmoil, which leads to increased feelings of worry and stress. Antonyms for the words carefree and untroubled provide an opposite viewpoint to enhance sustainable balance in everyday life.