开合

开合	kāi hé	to open and close
开	kāi	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, 开尔文 / abbr. for 开本, book format
合	gě	100 ml / one-tenth of a peck / measure for dry grain equal to one-tenth of sheng 升 or liter, or one-hundredth dou 斗
合	hé	to close / to join / to fit / to be equal to / whole / together / round (in battle) / conjunction (astronomy) / 1st note of pentatonic scale / old variant of 盒
合	hé	variant of 合