段差

1. Origins, structure, and basic meaning

• Structure: 段差 (だんさ) combines level 段 and difference 差 to name a step or height difference between adjoining surfaces.
• Basic usage: 段差 denotes a difference in height between adjoining surfaces or the resulting step.

2. Common pitfalls and similar expressions

• A step or difference in level
  • 段差に can mark the point encountered, while 段差を can mark what is crossed or removed.