The word "worried sick" is often used to describe someone who is feeling extremely anxious or stressed. However, there are several antonyms for this phrase that suggest a more relaxed or content emotional state. For example, you might say someone is "calm and collected," "at ease," or "carefree." Other antonyms could include "happy-go-lucky," "free-spirited," "tranquil," or "blissful." Each of these antonyms suggest a very different emotional state than "worried sick," making them useful for describing a variety of attitudes and perspectives in different situations. Whether you're feeling worried or not, it's always important to find ways to manage your emotions and find peace of mind.