堤

1. Origins, structure, and basic meaning

• Structure: 堤 is read as つつみ and is a noun for an embankment or levee built to contain or guide water.
• Basic usage: Use 川沿いの堤を走る for travel along it and 堤の一部を補強する for work on part of the structure.

2. Common pitfalls and similar expressions

• Route-marking を
  • In 堤を走る, を marks the route traveled rather than an object directly acted upon.
• Structure rather than any riverbank
  • The word focuses on an embankment that can require reinforcement, not every naturally occurring bank beside a river.