The term "swollen belly" typically refers to a distended or bloated abdomen. However, there are several antonyms to this condition that represent a flat, toned, and healthy belly. Some of these antonyms include lean, taut, slim, firm, toned, chiseled, washboard, ripped, and tight. Achieving a toned and healthy belly requires a consistent workout routine, balanced nutrition, and a healthy lifestyle. Exercises that target the abdominal muscles, such as crunches, planks, and Russian twists, can help tone the belly's muscles and achieve a flatter appearance. Ultimately, adopting a healthy lifestyle can lead to a trimmer waistline and a healthier self.