Unbolted refers to something that is not securely locked or fastened. The opposite of more unbolted would be more secure, tightly locked or fastened. Some common antonyms for unbolted include locked, sealed, latched, bolted, fastened, secured, and closed. These antonyms imply a sense of safety, protection, and security that is opposite to the openness and vulnerability that come with being unbolted. By using the right antonym for unbolted, we can convey a completely different meaning and mood to our writing. For instance, we can describe a safe or secured environment by using antonyms for unbolted.