• 世界せかい — the world
• 世代せだい — generation
• 世よの中なか — society, this world
• 世紀せいき — century
• 出世しゅっせ — career advancement
• 後世こうせい — future generations

The character 世 is formed from three repetitions of the number ten (十), symbolizing a span of thirty — often used metaphorically for a lifetime or era. It represents a generational span, social time frame, or worldly view.

世よの中なかは 変かわり続つづけています。
The world keeps changing.

新あたらしい世代せだいが社会しゃかいを変かえる。
The new generation is changing society.

🎧 Listen to the pronunciation of セイ and よ below.