開課

school begins / give a course / teach a subject

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

subject / course / CL:門|门[men2] / class / lesson / CL:堂[tang2],節|节[jie2] / to levy / tax / form of divination