延びる

1. Origins, structure, and basic meaning

• Structure: 延びる is read as のびる and is an intransitive verb for a deadline, schedule, or departure time being extended or postponed.
• Basic usage: A period being extended appears in 工事の期限が延びる, while a delayed schedule appears in 出発が翌朝まで延びる.

2. Common pitfalls and similar expressions

• Intransitive and transitive forms
  • When the schedule itself changes, use 期限が延びる; when someone changes it, use the transitive form 期限を延ばす.
• Distinction from 伸びる
  • Although pronounced the same, 延びる covers extensions or postponements of time, while 伸びる describes length, height, or ability growing.