The antonyms for "bustier" are "flatter" and "less busty." These words describe clothing that does not enhance the size of the breasts, but rather makes them appear smaller or less prominent. Flattering tops and dresses can potentially reduce the appearance of a larger bust. In contrast, less busty clothing may have a lower neckline, less padding, or a looser fit, resulting in a more modest and streamlined look. While some may prefer to accentuate their curves, others may opt for a more subtle silhouette. Whatever one's preference, there are plenty of fashion options available to suit all body types and personal styles.