Verb (5-dan, く, transitive)
1. to open; to undo; to unseal; to unpack
2. to bloom; to unfold; to spread out
3. to open (for business, e.g. in the morning)
4. to be wide (gap, etc.); to widen
Verb (5-dan, く, transitive)
5. to hold (meeting, party, etc.); to give; to open
6. to found (nation, dynasty, sect, etc.); to open (a new business); to set up; to establish; to start
7. to open (ports, borders, etc.)
8. to open (an account)
9. to open up (new land, path, etc.); to clear; to develop
10. to open (a file, etc.)
11. to extract (root); to reduce (equation)
12. to cut open (fish)
as 魚を開く
13. to change (kanji into hiragana)
Verb (5-dan, く, intransitive)
14. to flare (e.g. skirt)
15. to slacken (into a poor posture)
as 体が開く, 肩が開く, etc.