This is the 1544th most frequent Japanese word.
世間
"世間" (seken) refers to society, the world, or public perception.
In this sentence, '世間' is used to refer to the entire world or society, indicating the vastness and diversity encountered.
世間は広いですね。
The world is vast, isn't it?
Here, '世間' is used in '世間体', referring to public appearance or reputation, showcasing concerns over societal perception.
彼は世間体を気にしすぎる。
He cares too much about public reputation.
In this instance, '世間' refers collectively to society, emphasizing the importance of understanding its norms and common practices.