To describe an opposite of stale smelling, one could use a range of adjectives, including fresh, fragrant, sweet-smelling, and delightful. A fresh smelling scent might evoke images of blooming flowers, crisp linens, or the ocean breeze. Fragrant could suggest something perfumed or aromatic, such as a scented candle or a freshly baked pie. Sweet-smelling might be associated with the aroma of vanilla, lavender, or even freshly mowed grass. Using the term delightful could convey a sense of pleasure or happiness, as if the mere smell could bring joy to one's day. Regardless of the term used, the opposite of stale smelling is something invigorating, refreshing, and pleasant.