to bloom / to open / to be open (to the public) / to open up (to the outside) / to be open-minded / unrestrained by convention / unconstrained in one's sexuality
to open / to start / to turn on / to boil / to write out (a prescription, check, invoice etc) / to operate (a vehicle) / carat (gold) / abbr. for Kelvin, 開爾文|开尔文[Kai1 er3 wen2] / abbr. for 開本|开本[kai1 ben3], book format