再生

1. Origins, structure, and basic meaning

• Structure: 再生 is read さいせい and means playing a recording or restoring something that has deteriorated.
• Basic usage: It is used for listening to a recorded voice or describing efforts to restore a devastated forest.

2. Common pitfalls and similar expressions

• Recording and playback
  • 録音(ろくおん) means recording sound, while 再生 means outputting the recorded sound so it can be heard again. 録音した声を再生して describes playing back a voice that was previously recorded.