sluice
noun
an artificial channel for conducting water, often fitted with a gate sluice gate at the upper end for regulating the flow.
Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
They were here at the foot of a glacier stream, from the bed of which they had been sluicing gold.
From Alaska Days with John Muir by Samual Hall Young
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