noun
wain
WAYN/wˈeɪn/
An old-fashioned wagon or cart.
The wooden wain carries a large load of hay on four spoked wheels.
Etymology
The Old English word meant a wheeled vehicle or cart generally. In later usage, wain came to distinguish a large, open vehicle for heavy loads, especially agricultural ones.
In context
which depicts a hay wagon (also called wain) as it stops midstream, perhaps to let the horses cool themselves.