<Tr> <Th> Japanese </Th> <Td> shi </Td> <Td> shi </Td> </Tr> <P> Tetraphobia (from Greek τετράς--tetras, "four" and φόβος--phobos, "fear") is the practice of avoiding instances of the number 4 . It is a superstition most common in East Asian nations . </P> <P> The Chinese word for four (四, pinyin: sì, jyutping: sei), sounds quite similar to the word for death (死, pinyin: sǐ, jyutping: sei), in many varieties of Chinese . Similarly, the Sino - Japanese, Sino - Korean, and Sino - Vietnamese words for four, shi (し, Japanese), and sa (사, Korean), sound similar or identical to death in each language (see Korean numerals, Japanese numerals, Vietnamese numerals). Tetraphobia is known to occur in Korea and Japan since the two words sound indentical, but not at all in Vietnam because they carry different tones (in the case of the word for "four", whether it's the Sino - Vietnamese reading tứ or the more common non-Sino - Vietnamese reading tư, neither sounds like the word for "death" which is tử), and Vietnamese does not use Sino - Vietnamese numerals as often in the first place . </P> <P> Special care may be taken to avoid occurrences or reminders of the number 4 during everyday life, especially during festive holidays, or when a family member is ill . Mentioning the number 4 around a sick relative is strongly avoided . Giving four of something is strongly discouraged . Elevators in Asia and Asian neighborhoods often skip the 4th floor or any floor whose number contains the digit "4" (as 14, 24, etc .). Military aircraft and ships also avoid the number 4 (such as the South Korean and Taiwanese navies) due to its extreme negative connotations of death . April 4 is also considered an exceptionally unlucky day (much like Friday the 13th in the West). </P>

Why is there no 4th floor in hospitals
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