The phrase "most multihued" refers to something that contains many colors or is very colorful. Some synonyms for "multihued" could include "colorful," "variegated," "vibrant," "rainbow-like," "brightly hued," "chromatic," "polychromatic," "iridescent," "prismatic," "kaleidoscopic," or "technicolor." Each of these words conveys the idea of something that is vibrant and bursting with colors. Whether you're describing a sunset, a bouquet of flowers, or a piece of artwork, using one of these synonyms can help to add more color and depth to your descriptions.