The word "concaving" denotes a shape or surface that curves inward, like a bowl or a cave. Its antonym refers to a surface that curves outward, such as a dome or a hill. The opposite of concaving can also be described as convex, rounded, or bulging. Concaving and its antonyms are commonly used in geometry, physics, and other natural sciences to describe the curvature of objects and surfaces. In art, architects and sculptors use these terms to create different effects and illusions in their designs. Knowing the antonyms of concaving allows for a more nuanced understanding of shape and form in various fields.