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world; society; public
life; lifetime
age; era; period; epoch; generation
reign; rule
the times
world (of existence)
世の中には色々な人がいるね。
There are all kinds of people in the world.
戦国の世は争いが絶えない時代だったそうだ。
The Warring States period was an era of constant conflict.
世の中は厳しいものですよと教えられた。
The world is a harsh place.