“west” in Japanese is 西, read sei, sai, nishi (せい, さい, にし). It is a Grade 2 Kyōiku kanji, taught in year 2 of Japanese elementary school, and appears in words such as 西洋 (the West).
What does 西 mean?
西の空が赤い。
Same sound, different character — the classic trap. Compare them side by side: