Indenting is a word that typically refers to creating a visible impression on a surface by pressing or forcing something onto or into it. Its antonym would be a term used to describe the act of raising or elevating a surface, such as popping or protruding. Other antonyms for indenting might include flattening, smoothing, straightening, or leveling, which suggest pushing or evening out a surface. Alternatively, stretching, expanding, or inflating could be used to describe a process of expanding a surface outwards, while contracting or shrinking would be used to describe the opposite. Depending on the context, there may be multiple antonyms for the word "indenting".