The word "most unperfumed" implies something that is scentless or odorless. Therefore, its antonyms would be words that describe fragrant, aromatic, or scented objects or places. Some of the antonyms for the word "most unperfumed" are: fragrant, perfumed, aromatic, scented, sweet-smelling, ambrosial, redolent, odorous, and flavorful. These words can be used to describe flowers, essential oils, foods, perfumes, and many other things that emit pleasant aromas. In summary, the antonyms for "most unperfumed" evoke a sense of pleasant aroma and can be used to add positivity to any description.