Tetraphobia is the fear of the number 4. In some East Asian cultures, the number 4 is considered unlucky because it sounds similar to the word for “death.” This superstition has led to buildings skipping the 4th floor, hospitals avoiding room numbers with the number 4, and many other cultural practices. People with tetraphobia experience anxiety and distress when they encounter the number 4.

Further Reading:

https://en.wikipedia.org/wiki/Tetraphobia

https://www.joincake.com/blog/tetraphobia/

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