Most anachronous refers to something that is outdated or no longer relevant in today's society. Its antonyms, or opposite words, are modern, contemporary, up-to-date, and relevant. When something is modern, it is considered new or recent and fits in with the current trends and technologies. Similarly, when something is contemporary, it is of the present or recent time and is fashionable or up-to-date. Furthermore, when something is up-to-date, it means that it is current or modern, and it has been updated with the latest information or technology. Lastly, if something is relevant, it is important or significant and can have an impact on current situations or events.