The antonym for the word "un-sheltered" is "sheltered." Sheltered means protected and secured. If someone is sheltered, they are protected from the harsh elements, such as wind and rain. They are secure and protected from danger, such as wild animals or thieves. Sheltered can also refer to someone who is protected from harsh realities or experiences. In contrast, un-sheltered means someone who is not protected or secured. They are exposed and vulnerable to the elements, danger, or harsh experiences. Therefore, it is essential to have a sheltered and safe home, workplace, or environment to protect ourselves and our loved ones.