The word "most calescent" means extremely hot or burning. Its antonyms, or opposite meanings, could be "cold," "cool," "chilly," "frosty," or "frigid." These words describe a lack of heat, opposite to the extreme heat conveyed by "most calescent". They can be used to describe temperatures, feelings, or actions. For example, one might say they feel "cold" towards someone or something they do not like, while feeling "warm" or "fond" towards someone or something they enjoy. Understanding antonyms can help you expand your vocabulary and communicate in a more precise and effective way.