The term 'in flaming' implies an intense burning or blazing, and its antonyms are words that denote the opposite of this feeling. Some of the antonyms for the word 'in flaming' are cold, cool, and icy, all of which suggest a lack of warmth or heat. Other antonyms include dull, lifeless, and boring, which provide a contrasting meaning to the bright and vibrant connotations of 'in flaming.' Additionally, words such as calm, peaceful, and tranquil can also serve as antonyms to 'in flaming,' conveying a sense of serenity and placidity rather than intense emotion.