The opposite of loudvoiced can be described using a range of different antonyms, including soft-spoken, quiet, hushed, subdued, muted, and tranquil. Soft-spoken implies a gentle manner of speaking, while quiet suggests a subdued or muted tone. Hushed indicates a whisper-like quality, while subdued connotes a low-key or restrained speaking style. Muted implies a tone that is softened or muffled, while tranquil suggests a peaceful and calm manner of speaking. Each of these antonyms offers a different shade of meaning in opposition to the word loudvoiced, allowing speakers and writers to convey a wide variety of nuances and moods in their communication.