開く

also 空く · 明く

1. godan verb, intransitive, esp. 開く to open (e.g. doors)
2. esp. 開く to open (e.g. business, etc.)
3. esp. 空く to be empty
4. esp. 空く to be vacant; to be available; to be free
5. esp. 明く to be open (e.g. neckline, etc.)
6. esp. 明く to have been opened (of one's eyes, mouth, etc.)
7. esp. 明く to come to an end
8. godan verb, transitive, esp. 明く to open (one's eyes, mouth, etc.)
9. godan verb, intransitive to have a hole; to form a gap; to have an interval (between events)

ひらく

1. godan verb, intransitive, transitive 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
5. godan verb, transitive 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. computing to open (a file, etc.)
11. mathematics to extract (root); to reduce (equation)
12. food, cooking, as 魚を開く to cut open (fish)
13. to change (kanji into hiragana)
14. godan verb, intransitive to flare (e.g. skirt)
15. sports, as 体が開く, 肩が開く, etc. to slacken (into a poor posture)
16. usually in kana, go (game), usu. ヒラく to extend