The character for west and 4 are very similar is there any explanation for this or is that pure coincidence?
Specifically, if you remove the portion of 西 outside of the 口 what remains appears to be 四.
The character for west and 4 are very similar is there any explanation for this or is that pure coincidence?
Specifically, if you remove the portion of 西 outside of the 口 what remains appears to be 四.
Although they look similar, the top line cannot just be cut off. 四 is made of the radicals 口 and 儿 while 西 is made of the radicals 口 and 兀. (Although technically you could break that down into 一 and 儿 itself it'd change its "meaning").
Looking up each characters' baidu entries tell their origins: 西 is originally supposed to be a bird returning to its nest at sunset, and so became the meaning of West. 四 has less consensus on its origin, but it looks like it coexisted with the alternate versions of four vertical lines and four horizontal lines for awhile in the past long ago.
Multiple theories seem to exist about why 四became what it is (one I read seemed to say that it was a vertical four combining with a horizontal two showing "2 twos" as the original meaning). Regardless I think its safe to say the similar appearace is just the coincidence of simple characters having small differences.
The ancient forms of the two were not that similar. See the graphics and explanations below.
四: (指事字 - ideogram (one of the Six Methods 六書|六书 of forming Chinese characters), Chinese character indicating an idea, such as up and down, also known as self-explanatory character.)
【說文】囗,四方也。八,別也。囗中八,象四分之形。 (Note, 四分 means the space of 囗 plus the 3 spaces separated by 八 resulting in 3+1=4, the number four.)
西: (象形字 - pictogram, one of the Six Methods 六書|六书 of forming Chinese characters, Chinese character derived from a picture, sometimes called hieroglyph.)
【說文】鳥在巢上也。日在西方而鳥栖,故因以爲東西之西。
Note, @zagrycha got this right.