世
せ
い
Meanings
1
counter for generations
Used with numbers to count generations, reigns, or dynasties. Often seen in historical or family contexts.
Louis XIV was a king of France.
The 15th Tokugawa shogun was Yoshinobu.
2
Geological suffix for naming epochs, such as 更新世 (Pleistocene). Not used as a standalone word for 'epoch'.
The Pleistocene is also called the Ice Age.