Meanings

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