开

Meaning

1. to open
2. to start
3. to turn on
4. to boil
5. to write out (a prescription, check, invoice etc)
6. to operate (a vehicle)
7. carat (gold)
8. abbr. for Kelvin, 開爾文|开尔文[Kai1 er3 wen2]
9. abbr. for 開本|开本[kai1 ben3], book format