• 河川かせん — rivers / waterways
• 銀河ぎんが — galaxy / Milky Way
• 黄河こうが — Yellow River (China)
• 山河さんが — mountains and rivers
• 運河うんが — canal / waterway
• 大河たいが — great river

More examples ▼

河 combines the water radical 氵 with the phonetic 可, indicating a sizeable flowing body of water. It is common in geographic names and compounds.

山河さんがは 美うつくしい。
The mountains and rivers are beautiful.

黄河こうがは 中国ちゅうごくの 重要じゅうような 川かわです。
The Yellow River is an important river in China.