怎麼回事 zěn me huí shì

DEFINITIONS

  1. what's the matter?
  2. what's going on?
  3. how could that be?
  4. how did that come about?
  5. what's it all about?

CHARACTERS

怎 zěn
HSK 1
what? why? how?
麼 me interrogative final particle; insignificant, small, tiny
回 huí
HSK 1
return, turn around; a time
事 shì
HSK 2
affair, matter, business; to serve; accident, incident