稳固

穩固
wěngù
  1. stable
  2. steady
  3. firm
  4. to stabilize

CEDICT

Entry Composition

1 稳 wěn settled; steady; stable
2 固 gù
  1. hard
  2. strong
  3. solid
  4. sure
  5. assuredly
  6. undoubtedly
  7. of course
  8. indeed
  9. admittedly