zài ㄗㄞˋ

  1. again once more re-
  2. further beyond this point of time
  3. more

    before an adjective

  4. then (after sth, and not until then)
  5. no matter how ... (followed by an adjective or verb, and then (usually) 也[ye3] or 都[dou1] for emphasis)
  6. (used to introduce additional information, as in 再則|再则[zai4 ze2], 再就是[zai4 jiu4 shi4] etc)
  7. to reappear to reoccur

    literary

Where 再 is used

Sources