及ぶ

1. Origins, structure, and basic meaning

• Structure: 及ぶ is read as およぶ and is an intransitive verb for an effect or range extending to a target or a quantity or duration reaching a stated extent.
• Basic usage: An affected area appears in 三つの村に及ぶ, while duration appears in 五時間に及ぶ.

2. Common pitfalls and similar expressions

• Range and quantity
  • It covers spatial spread to several villages and quantitative extent such as a meeting reaching five hours.
• Difference from 達する
  • 達する broadly reaches a goal or figure; 及ぶ strongly presents influence or range extending as far as that point.