運河

1. Origins, structure, and basic meaning

• Structure: 運河, read うんが, denotes a waterway constructed by people for navigation, drainage, or a similar purpose.
• Basic usage: It names a man-made waterway traveled by boats and crossed by a stone bridge.

2. Common pitfalls and similar expressions

• A constructed waterway rather than a river
  • The focus is a waterway constructed for navigation or drainage rather than a naturally formed river.