天機

天机
tiānjī
  1. mystery known only to heaven (archaic)
  2. inscrutable twist of fate
  3. fig. top secret

CEDICT

archaic

Entry Composition

1 天 tiān
  1. day
  2. sky
  3. heaven
2 機 jī
  1. (bound form) machine; mechanism
  2. (bound form) aircraft
  3. (bound form) an opportunity
  4. (bound form) crucial point; pivot
  5. (bound form) quick-witted; flexible
  6. (bound form) organic