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Underfoot, some trench interiors were floored with wooden walkways called duckboards.

The singers in this production are often walking across duckboards, like the ones in the trenches of Flanders.

BOHDANIVKA, Ukraine — The trenches, the dugouts, the duckboards, the wood-burning stoves, the cold and mud seem to hark back to the First World War.

I learned that a tarn is a pond, a gill is a stream, and duckboards are slats across boggy ground.

Another shed contains a thunderstorm, with lightning flashes, dark rumbles and water falling on the sodden duckboards at your feet.