• 西にし — west
• 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
• 東西とうざい — east and west
• 西日本にしにほん — Western Japan Voice Japan

More examples ▼

• 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
• 南西なんせい — southwest
• 北西ほくせい — northwest
• 西風にしかぜ — west wind
• 西側にしがわ — west side
• 西班牙スペイン — Spain (ateji)

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.