The antonyms for the word "more marked-out" include "less conspicuous," "subtle," "hidden," "obscure," "muted," "restrained," "low-key," "subdued," "quiet," and "unremarkable." These antonyms indicate a lack of attention-grabbing features and a more understated or subtle appearance. While "more marked-out" connotes a sense of distinction or prominence, these antonyms suggest a more subdued or unobtrusive quality. Depending on the context in which the word is used, these antonyms can provide a different perspective on the subject at hand. A more marked-out feature may be desirable in certain situations, whereas a more understated quality may be preferable in others.