能否

néngfǒu
  1. whether or not
  2. can it or can't it
  3. is it possible?

CEDICT

Entry Composition

1 能 néng
  1. can
  2. to be able to
  3. might possibly
  4. ability
  5. (physics) energy
2 否 fǒu
  1. to negate
  2. to deny
  3. not