不能

bùnéng
  1. cannot
  2. must not
  3. should not

CEDICT

Entry Composition

1 不 bù
  1. no; not so
  2. (bound form) not; un-
2 能 néng
  1. can
  2. to be able to
  3. might possibly
  4. ability
  5. (physics) energy