Sheltered, secure, protected, guarded, shielded, covered, concealed, roofed, defended, fortified, housed, shielded, screened, walled, barricaded, fenced are the possible antonyms for the word "unsheltered". Each of these antonyms implies a state in which an individual or an object is under some degree of protection from danger, harm, or adverse conditions. Being sheltered connotes a sense of safety and comfort, while being unsheltered connotes a lack of security and vulnerability. Antonyms for unsheltered describe a state of being that is opposite in meaning and importance to that of being unprotected and exposed to the elements.