The word "striated" refers to something that has stripes or lines. Therefore, the antonyms for "more striated" would be words that describe things that are either plain or smooth. Some possible antonyms include unmarked, unstriped, plain, smooth, featureless, flat, and plain. These antonyms can be used to describe objects, surfaces, or materials that lack visible lines or texture. For example, a smooth wall or a plain piece of paper. It is essential to note that antonyms vary depending on the context in which the word "striated" is used, and some words may be more appropriate than others.