• 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
• 世論よろん — public opinion

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.