The word "un-shuts" means to open or uncover something that was previously closed or obstructed. Antonyms for "un-shuts" would be words that describe the opposite action, such as "closes," "seals," "blocks," or "shuts." These words imply the act of preventing or restricting access to something, typically by closing a door, window or gate. While "un-shuts" implies an opening or freedom of movement, its antonyms imply confinement, restriction, or a lack of access. Overall, understanding antonyms can help you to better express your thoughts and ideas, as well as communicate more effectively with others.