(idiomatic) out of the blue, bolt from the blue, great surprise

to pour water (into); to dilute with water / (idiomatic) to hinder; to hamper; to throw cold water on; to put a damper on; to estrange (people)

(idiomatic) let the water carry it away, wipe the slate clean

water warmed in the sun

(smoking) a hookah; a waterpipe

(history) a 律令 (ritsuryō) position in the 後宮 (Kōkyū, “Seraglio”) that manages water and ice

(history) a 律令 (ritsuryō) position in the 後宮 (Kōkyū, “Seraglio”) that manages water and ice / Alternative spelling of 主水司

the Wei River

spirogyra

(chemistry) hydration (incorporation of water molecules into another compound)