The word "most skeletonlike" implies something that is extremely thin or bony. The antonyms for this phrase can be words like "fleshy," "plump," "chubby," or "rotund," which all refer to something with a healthy amount of fat and flesh on it. Other antonyms could include words like "curvy," "shapely," or "well-proportioned," which suggest a pleasing bodily figure that is not exceedingly thin or bony. While "most skeletonlike" might connote an unhealthy or emaciated appearance, these antonyms indicate a healthier and more robust body type, one that is valued for its vitality and well-being.