Barrier (noun)

1. A physical object or structure that prevents or obstructs passage.
2. A psychological or emotional obstacle that prevents communication or understanding.
3. A measure or condition that limits or restricts access or progress.

Origin:

Derived from the french word "barriere", the word "barrier" was first used in the 16th century to describe a structure or object that prevents or obstructs passage.

Examples:

1. The barrier of the Great Wall of China was built to protect the country from invasions.
2. The language barrier was a major hindrance in their communication.
3. The economic barrier prevented many people from obtaining higher education.
4. The barrier of the coral reef protected the shoreline from the strong waves.
5. The barrier of the soundproof walls ensured privacy in the recording studio.