An antonym for loud is ‘quiet.’
Quiet refers to a low level of sound, making it the opposite of loud, which signifies high intensity or volume. In daily conversations, when something is described as loud, it often means that it dominates the surrounding noise. Conversely, quiet can describe environments, actions, or even people who exhibit soft-spoken behavior or minimal noise, creating a calming atmosphere. Understanding antonyms like these helps us better articulate our thoughts by contrasting different concepts.