extend

1. Origins, structure, and basic meaning

• Structure: 延 has 8 strokes, the on-reading えん, and the kun-readings のびる, のべる, and のばす. 延長 (えんちょう) expresses an increase in length or duration.
• Basic usage: 延長 means an extension of time or length; 延期 (えんき) means postponing something planned.

2. Common pitfalls and similar expressions

• Extending and postponing
  • 試合時間が三十分延長された means that the match duration was extended by thirty minutes. 橋の延長工事 refers to work extending a bridge.
  • 運動会は翌週に延期されました means that the sports day was postponed until the following week. 展示の開始を延期しました also shifts a start time later.