The word "un-embellished" means plain or basic. Its antonyms include decorative, adorned, ornate, embellished, decorated, adorned, and embellished. These words denote the opposite of something that is simple or plain. Decorative refers to something that has been made more attractive by adding decorations or ornaments. Ornate denotes something that is highly decorated or extravagant with intricate details. Embellished refers to something that has been enhanced with additions or decorations. Adorned means something that has been made more beautiful by adding adornments. The antonyms of "un-embellished" all indicate that something has been improved by additional decoration or ornamentation.