Worry-free is a term that indicates complete freedom from anxiety and stress. However, when it comes to antonyms, there are several words that come to mind such as anxious, worried, uneasy, concerned, fretful, restless, and nervous. These words signify the opposite of the state of being worry-free, as they suggest a state of unease or concern about something. Anxious and worried are perhaps the most common antonyms of worry-free, as they both imply a level of stress and fear that can be overwhelming at times. Overall, there are many antonyms for worry-free, all of which indicate a state of anxiousness, apprehension, or concern.