じゅう

In a sentence

• 私は一日中働きました。

  I worked all day.

  Here, 'じゅう' is used in the sense of 'throughout' or 'all over,' attached to '一日' (a day) to imply 'all day long.'

• 彼は世界中を旅したいです。

  He wants to travel all over the world.

  In this case, 'じゅう' is used to indicate 'throughout' or 'all over,' combined with '世界' (the world) to express 'all over the world.'

• 公園内は禁煙です。

  Smoking is prohibited inside the park.

  Although 'じゅう' is not explicitly present, understanding phrases typically involving 'じゅう' can inform one about spatial or domain-related usage for context.