正確

1. Origins, structure, and basic meaning

• Structure: 正確(せいかく) describes something that matches the facts or a standard without error; 正確だ states that it is accurate.
• Basic usage: It is used for handling addresses or information accurately, and for clocks or measurements that match a standard.

2. Common pitfalls and similar expressions

• な before a noun and に before a verb
  • 正確な住所 describes the address itself, while 住所を正確に入力する describes how it is entered. Use な before a noun and に to modify an action.
• An accurate clock
  • 時計は正確だ means that the clock keeps accurate time. In the example, 古いが contrasts the clock's age with its accuracy.