昼

1. Origins, structure, and basic meaning

• Structure: 昼 is read ひる and means daytime or the time around noon.
• Basic usage: It is used for daytime weather contrasted with night and for the time when lunch was eaten with a friend.

2. Common pitfalls and similar expressions

• Day and night
  • 昼は暖かい says that the daytime is warm in contrast with night.
• Around noon
  • 今日の昼 refers to the time around noon today.