开心

to feel happy / to rejoice / to have a great time / to make fun of sb

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

heart / mind / intention / center / core / CL:顆|颗[ke1],個|个[ge4]