牢固

láogù
  1. firm
  2. secure

CEDICT

Entry Composition

1 牢 láo
  1. firm
  2. sturdy
  3. fold (for animals)
  4. sacrifice
  5. prison
2 固 gù
  1. hard
  2. strong
  3. solid
  4. sure
  5. assuredly
  6. undoubtedly
  7. of course
  8. indeed
  9. admittedly