• 西口にしぐち — west exit
• 西洋せいよう — the Western world
• 関西かんさい — Kansai region
• 西部せいぶ — western area
• 西暦せいれき — Western calendar / Common Era
• 西欧せいおう — Western Europe

The kanji 西 originally depicted a bird's nest and came to represent the direction birds return to — the west, where the sun sets. It's long been associated with endings, dusk, and the idea of going home.

西にしの 空そらが 赤あかく そそまってきた。
The western sky has turned red.

西洋せいようの 文化ぶんかを 学まなぶ。
I study Western culture.