门槛

門檻
ménkǎn
  1. doorstep
  2. sill
  3. threshold
  4. fig. knack or trick (esp. scheme to get sth cheaper)

CEDICT

Entry Composition

1 门 mén
  1. gate
  2. door
  3. gateway
  4. doorway
  5. opening
  6. valve
  7. switch
  8. way to do something
  9. knack
  10. family
  11. house
  12. (religious) sect
  13. school (of thought)
  14. class
  15. category
  16. phylum or division (taxonomy)
  17. classifier for large guns
  18. classifier for lessons, subjects, branches of technology
  19. (suffix) -gate (i.e. scandal; derived from Watergate)

classifiers: 扇, 個
2 槛 kǎn
  1. door sill
  2. threshold