不显山不露水

lit. to not show the mountain and to not reveal the water (idiom); fig. to hide the key facts

no; not so / (bound form) not; un-

to make visible / to reveal / prominent / conspicuous / (prefix) phanero-

mountain / hill / anything that resembles a mountain / CL:座[zuo4] / bundled straw in which silkworms spin cocoons / gable

surname Lu

to show / to reveal / to betray / to expose

dew / syrup / nectar / outdoors (not under cover) / to show / to reveal / to betray / to expose

dew / fig. short-lasting / ephemeral

surname Shui

water / river / liquid / beverage / additional charges or income / (of clothes) classifier for number of washes