to open (transitive or intransitive); (of ships, vehicles, troops etc) to start; to turn on; to put in operation; to operate; to run; to boil; to write out (a prescription, check, invoice etc); (directional complement) away; off; carat (gold); abbr. for Kelvin, 開爾文|开尔文[Kai1 er3 wen2]; abbr. for 開本|开本[kai1 ben3], book format

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

to open fire; to shoot a gun

to play a joke; to make fun of; to joke

to drive a car (or train etc); (slang) to post sexual content online; to make a sexual joke