The antonyms for the word "un-anxious" include anxious, worried, concerned, apprehensive, nervous, agitated, stressed, and uneasy. When one is anxious or worried, they experience a sense of unease, tension, and fear. Concerned individuals are troubled or bothered about a potential issue. Being apprehensive entails feeling fearful or uncertain for what might happen in the future, while nervousness is a feeling of worry or unease. Stressed people experience mental or emotional strain or tension, while those who are uneasy are not comfortable or relaxed. These antonyms highlight the various emotions that people can feel when they are not at ease and emphasize the importance of addressing these feelings.