unguarded

Universal Words adjective 1 not protected or watched: The museum was unguarded at night. * an unguarded fire (= that has nothing to stop people from burning themselves on it) 2 (of a remark, look, etc.) said or done carelessly, at a time when you are not thinking about the effects of your words or are not paying attention: an unguarded response / remark * It was something I'd let out in an unguarded moment. compareGUARDED