Old English wægn "wheeled vehicle, wagon, cart," from Proto-Germanic *wagnaz (see wagon). Largely fallen from use by c. 1600, but kept alive by poets, who found it easier to rhyme on than wagon. As a name for the Big Dipper/Plough, it is from Old English (see Charles's Wain).
双语例句
1. These ideas are summarized in a diagram reproduced from Wain and Fawcett.