同窓会

1. Origins, structure, and basic meaning

• Structure: 同窓会 (どうそうかい) is an event where alumni meet again. 同窓会が開かれる concerns its holding; 同窓会で再会する makes it the occasion of a reunion.
• Basic usage: A class reunion is held ten years after graduation, and old friends meet again at one after a long absence.

2. Common pitfalls and similar expressions

• Event being held and occasion for meeting again
  • In passive 開かれた, the event is the subject; with locative で, the participants' reunion is central. The word denotes the gathering rather than the alumni body itself.