Newfashioned is a word used to describe something trendy or modern. Its antonyms are words that describe things that are old-fashioned, traditional or outdated. Some of these antonyms include ancient, antiquated, dated, archaic, outmoded, old-school, old-style, and retro. Ancient is used to describe something that is very old, while antiquated denotes something that is no longer in use because it is too old or out-of-date. Dated describes something that is no longer modern, while archaic is a term used to describe something old and no longer in use. Outmoded also describes something that is no longer fashionable, while old-school and old-style describe something that is traditional or from an earlier time. Finally, retro refers to something that is old-fashioned but has recently come back into fashion.