The phrase "chill the bone" typically refers to a bone-cold feeling or a sensation of extreme coldness that penetrates deep into the bones. Some antonyms for this phrase could be words like warm, cozy, comfortable, or snug. These words evoke feelings of warmth and contentment, and are the opposite of feeling chilled to the bone. Other antonyms could include words like hot, heated, sultry, or balmy, which suggest that the air or atmosphere is warm and comfortable. These antonyms help to paint a picture of warmth and comfort, which is a stark contrast to the sensation of being chilled to the bone.