The term "un-fashionable" refers to something that is not in vogue, out of date, or unfashionable. There are a plethora of synonyms for the word "un-fashionable," including outdated, unfashionable, archaic, passe, old-fashioned, antiquated, obsolete, outmoded, and out of fashion. These words allude to something that is no longer in style, and may have fallen out of favour due to changing trends or cultural shifts. It is crucial to note that what is deemed "un-fashionable" often depends on personal taste and preferences, so something that is considered outdated by one person may still hold value or relevance to another.