世紀

1. Origins, structure, and basic meaning

• Structure: 世紀, read せいき, means a century, a period used to group years into hundred-year eras.
• Basic usage: It dates a station building to the early twentieth century or sets fiction in the twenty-third century.

2. Common pitfalls and similar expressions

• A period measured in centuries
  • It places events in a hundred-year period, such as the early twentieth century or a fictional twenty-third century. Its range is broader than one exact year.