The phrase "chills to the bone" indicates an extremely cold sensation that reaches deep into one's body. It expresses a feeling of discomfort or unease. Opposite words to describe this sensation may include "warm," "cozy," or "comforting." These words might bring to mind the feeling of being wrapped in a warm blanket or sitting in front of a roaring fire on a cold night. Additionally, antonyms of "chills to the bone" might include "calm" or "relaxing," meaning a state of ease and tranquility rather than discomfort and unease. Overall, antonyms of "chills to the bone" describe sensations that are positive, relaxing, and pleasurable.