The term "un-bolted" refers to something that is not secured or fastened properly. Antonyms for "un-bolted" include "secured," "fastened," "locked," "bolted," "closed," "sealed," and "shut." These words describe an opposite state or condition where something is properly closed or fixed in place. It is essential to ensure that doors and windows are locked and bolted to prevent unauthorized entry. Additionally, objects or machinery must be tightly secured to prevent accidents or mishaps. Using antonyms for "un-bolted" emphasizes the importance of proper security and maintenance in various aspects of life, property, and business.