The phrase "chilled to the bone" refers to a feeling of extreme coldness that penetrates deep into the body. Antonyms for this phrase might include "warm and cozy," "toasty," or "comfortably warm." These words evoke a sense of comfort and warmth, in direct contrast to the feeling of being chilled to the bone. Other possible antonyms might include words like "relaxed," "at ease," or "calm," as these words signify a sense of comfort and lack of discomfort, rather than a physical sensation of coldness. Ultimately, the antonyms for "chilled to the bone" depend on the context of the phrase and the intended message.