不許

不许
bùxǔ
  1. not to allow
  2. must not
  3. can't

CEDICT

Entry Composition

1 不 bù
  1. no; not so
  2. (bound form) not; un-
2 許 xǔ
  1. to allow
  2. to permit
  3. to promise
  4. to praise
  5. somewhat
  6. perhaps