The word "smoketight" refers to something that is tightly sealed enough to prevent the passage of smoke. Synonyms for this term include airtight, closed, shut, hermetic, impervious, sealed, secure, and sound. These words all describe something that has been tightly sealed or closed, preventing any smoke or other elements from passing through. These terms are often used in construction, particularly when referring to the sealing of doors and windows to prevent the spread of smoke and ensure occupant safety. Regardless of the specific synonym used, the goal is always to create a barrier to smoke that will keep building occupants safe in the event of a fire or other emergency.