The word "most sharp-edged" refers to something that is incredibly sharp or pointed. The antonyms for this term would be words that indicate the opposite, such as dull, blunt, or round. A dull object is not sharp at all, while a blunt object has lost its sharpness over time. Similarly, a round object has no sharp edges at all. Other antonyms for "most sharp-edged" might include smooth, coarse, or soft, as these words suggest a lack of sharpness or pointedness. Whether you are describing a knife, a blade, or any other sharp object, these antonyms can help you to convey the opposite meaning of "most sharp-edged.