Tossed and turn, indicating restless and disturbed sleep, have several antonyms. The first and most obvious is peaceful sleep, with sound slumber and deep sleep also applicable. Other antonyms include serenity, calm, tranquility, and stillness, which are all terms indicating calm and relaxation. Other antonyms include swaddled, wrapped, and cozied, all suggesting comfort and warmth in bed. Additionally, synonyms for the opposite of tossing and turning include steady sleep, sound sleep, untroubled sleep, and silent sleep, which all describe a deep, clear, and uninterrupted state of slumber. The antonyms of the term tossed and turn, therefore, indicate a state of rest and calm.