noun
a sliding gate or other device for controlling the flow of water, especially one in a lock
verb
to draw off or let out by a sluice
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The engineers opened the sluice gates to control the flow of water from the reservoir.
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Hey, can you help me find the sluice so we can drain this water?
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I heard they're gonna sluice the whole area to clean it up.
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She felt a rush of emotions sluice through her as she read the letter.