The antonyms for the word "multihued" include monochromatic, monotone, monotonous, and single-colored. Monochromatic refers to a single color or shade, while monotone pertains to a singular audible pitch or tone. Monotonous means repetitive or unvarying, and single-colored denotes a single color or shade. All of these terms represent an absence or lack of diverse colors, making them ideal antonyms for multihued. By using these words, one can explicitly communicate the absence of a wide range of colors or tones, conveying a sense of simplicity, uniformity, or even boredom.