sluice

Anything that resembles a water slide with a gate is a sluice — a narrow channel that controls water flow.

The word originally comes from an old English word meaning a narrow channel that controlled a flow of water, usually to a watermill, and it still has that meaning. A sluice can also mean a splash — often with cold water and usually done with some vigor. A rude, watery slap in the face. Torture victims in movies inevitably have their faces sluiced to bring them round for further questioning.

Definitions of sluice
1

n conduit that carries a rapid flow of water controlled by a sluicegate

Synonyms:
penstock, sluiceway
Type of:
conduit
a passage (a pipe or tunnel) through which water or electric wires can pass

v pour as if from a sluice

“An aggressive tide sluiced across the barrier reef”
Synonyms:
sluice down
Type of:
pelt, pour, rain buckets, rain cats and dogs, stream
rain heavily

v irrigate with water from a sluice

sluice the earth”
Synonyms:
flush
Type of:
douse, dowse, drench, soak, sop, souse
cover with liquid; pour liquid onto

v draw through a sluice

sluice water”
Type of:
draw, take out
take liquid out of a container or well

v transport in or send down a sluice

sluice logs”
Type of:
transport
move something or somebody around; usually over long distances

Sign up, it's free!

Whether you're a student, an educator, or a life-long learner, Vocabulary.com can put you on the path to systematic vocabulary improvement.