When you say that you "am out of sorts," it means that you feel unwell or uncomfortable. However, there are several antonyms for this phrase, which means words that have opposite meanings. For example, if you are feeling energetic, healthy or fine, you can say that you are "in good shape" or "in top form." On the other hand, if you feel lively and active, you can use the word "vibrant" or "lively." If you are calm and relaxed, you can say that you are "at peace" or "calm." These antonyms can help you express your feelings in a more precise and clear manner, making it easier for others to understand you.