折り返す

1. Origins, structure, and basic meaning

• Structure: 折り返す is read as おりかえす and can mean “to fold back” or “to turn back”, depending on context.
• Basic usage: The examples show folding an envelope edge back and turning around before a bridge.

2. Common pitfalls and similar expressions

• Distinguishing senses and uses
  • It means folding material back on itself or reversing direction to return along a route.