究竟

jiūjìng
  1. to go to the bottom of a matter
  2. after all
  3. when all is said and done
  4. (in an interrogative sentence) finally
  5. outcome
  6. result

CEDICT

Entry Composition

1 究 jiū
  1. after all
  2. to investigate
  3. to study carefully
  4. Taiwan pr. jiù
2 竟 jìng
  1. unexpectedly
  2. actually
  3. to go so far as to
  4. indeed