再（zài）：表示重复或继续进行的意思，多用于动词或动作前，也可用于名词前加强语气。

How to pronounce: zài [zai]

Usage:

1. Used before a verb or action to indicate repetition or continuation.

Example: 我们需要再次确认订单信息。(Wǒmen xūyào zàicì quèrèn dìngdān xìnxī.) We need to confirm the order information again.

2. Used before a noun to emphasize.

Example: 这是我再大不过的荣誉了。(Zhè shì wǒ zài dà bùguò de róngyù le.) This is the greatest honor I have ever received.

3. Used in the phrase "再也不" (zài yě bù) to indicate "never again".

Example: 我再也不想吃这种食物了。(Wǒ zài yě bù xiǎng chī zhè zhǒng shíwù le.) I never want to eat this kind of food again.

4. Used in the phrase "再说" (zài shuō) to indicate "furthermore" or "moreover".

Example: 我们现在需要集中精力做好这件事情，再说其他的问题。(Wǒmen xiànzài xūyào jízhōng jīnglì zuòhǎo zhè jiàn shìqíng, zài shuō qítā de wèntí.) We need to focus on this matter now, furthermore, we can deal with other problems later.

5. Used in the phrase "再见" (zài jiàn) to say "goodbye".

Example: 我们明天再见。(Wǒmen míngtiān zài jiàn.) See you tomorrow.

Synonyms and Usage:

1. 再次 (zàicì): again, once again

Example: 请再次检查你的作业。(Qǐng zàicì jiǎnchá nǐ de zuòyè.) Please check your homework again.

2. 又 (yòu): again, also

Example: 他又迟到了。(Tā yòu chídào le.) He's late again.

3. 另外 (lìngwài): in addition, furthermore

Example: 我们还需要另外一些材料。(Wǒmen hái xūyào lìngwài yīxiē cáiliào.) We also need some other materials.

Editor's Summary:

再 is a versatile word that can be used before verbs or nouns to indicate repetition or emphasis. It can also be used in various phrases to express different meanings. Remember to use it correctly and appropriately in your daily conversations or writing.