全盛

1. Origins, structure, and basic meaning

• Structure: 全盛(ぜんせい) is a noun for the heyday or peak of a person, group, or place.
• Basic usage: A former heyday appears in 全盛だったころ, while an era at its height appears in 全盛を誇った時代.

2. Common pitfalls and similar expressions

• A period at its peak
  • It does not merely indicate a time of activity; it identifies the point of greatest power, popularity, or prosperity.
• Linking to time expressions
  • Use 全盛だったころ when looking back and 全盛を誇った時代 when describing an era.