The antonyms for the word "most sharpening" could be "dulling," "blunting," or "softening." When an object is dulled, it means that its sharpness has been reduced or lost over time. Blunting means that the edges of the object have been rounded or flattened, making it less sharp than before. Some materials, such as metal or wood, can be softened through various techniques, resulting in a less sharp surface. In contrast to "most sharpening," these antonyms refer to the opposite process where the object's sharpness is gradually diminishing rather than improving, highlighting the importance of proper maintenance to maintain its efficiency.