四 sì

四 sì is the numeral 4.

四 sì is more complicated to write than 1, 2, and 3. And, it sounds like the word for death if you do not know your Mandarin tones. 四 sì is the number 4 and because of this association with the sound of death, many people brought up in Chinese culture believe that 4 is a cursed number. If you want to find a house, or good deal on a number, and do not believe that 四 sì is bad, then you might get a deal. 四 sì also introduces one to the concept of boxes or frames in Chinese writing. From Wikipedia: https://enwp.org/Chinese_numerals