The antonyms for the word "more ornamented" are simplified, minimalist, unadorned, plain, austere, and unembellished. Simplified refers to something that has been made less complex. Minimalist indicates a style or design that uses a small number of elements to achieve simplicity. Unadorned means lacking decoration or embellishment. Plain denotes something that is lacking in ornamentation or embellishment. Austere suggests a lack of luxury, simplicity, or harshness. Lastly, unembellished refers to something that is plain and lacking decoration or ornamentation. These antonyms can be used to describe a style that is simple, understated, and lacking in decoration.