The antonym of "most unfurnished" would be "most furnished" or "fully furnished." It refers to living spaces or places that are equipped with all the essential furniture, appliances, and decor. Fully furnished spaces offer convenience and comfort to residents, as opposed to unfurnished spaces that require the tenant to provide their own furniture and appliances. With a furnished space, tenants can move in immediately without the hassle of buying or moving furniture. A fully furnished living space could have items like a bed, sofa, dining table, chairs, refrigerators, washing machines, and other appliances. In summary, the opposite of "most unfurnished" is "fully furnished.