通る

1. Origins, structure, and basic meaning

• Structure: 通る (とおる) is an intransitive verb for passing along a route or through an opening.
• Basic usage: A student crosses a bridge each morning; thread finally passes through a needle's eye after repeated attempts.

2. Common pitfalls and similar expressions

• Route traveled by a person and opening passed by a thin object
  • In 橋を通って, the bridge is the route, while in 針の穴を通る, the small opening is the passage point. Despite the route marker, the verb remains intransitive.