pinfold
An open enclosure for animals, especially an area where stray animals were rounded up if their owners failed to properly supervise their use of common grazing land.
These drawing near the wood, where close ypent / The wicked sprites in sylvan pinfolds were […]
Where it comes from
From Middle English pinfold, punfold, punfald, variants of Middle English pundfold, pundfald, from Old English pundfald (“pinfold”), equivalent to pound (“pen, enclosure”) + fold.
Adapted from the Wiktionary entry pinfold (CC BY-SA 4.0).