The antonyms for the word un-sharpened are sharpened, keen, pointed, acute, well-honed, and keen-edged. Sharpened means that an object has been made sharp or honed, while keen refers to an object or tool that has a sharp cutting edge or a sharp point. Pointed is used to describe an object with a sharp tip or end, while acute refers to objects with sharp and pointed angles or edges. Well-honed means that an object is well-sharpened and is ready for use, while keen-edged refers to an object or tool with a sharp cutting blade or edge. These antonyms can be used to describe objects such as pencils, knives, scissors, and other sharp tools.