沒事

没事
méishì
  1. it's not important
  2. it's nothing
  3. never mind
  4. to have nothing to do
  5. to be free
  6. to be all right (out of danger or trouble)

CEDICT

Entry Composition

1 沒 méi (negative prefix for verbs) have not; not
2 事 shì
  1. matter
  2. thing
  3. item
  4. work
  5. affair

classifiers: 件, 樁, 回