開く: meaning, reading and conjugation

Meaning

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