再開

1. Origins, structure, and basic meaning

• Structure: 再開 (さいかい) combines again 再 with opening 開 to denote starting something again after an interruption.
• Basic usage: It is used for activities such as matches, construction, or meetings that resume after stopping.

2. Common pitfalls and similar expressions

• Active and passive resumption
  • 再開した presents an agent resuming an activity, whereas 再開される presents the activity as being resumed.