Origin of cwm
Examples from the Web for cwm
I was hoping to get away to the left and traverse into the cwm; that too quite hopeless.Mount Everest the Reconnaissance, 1921|Charles Kenneth Howard-Bury
Further west there are several good gullies on the Cwm Glas side, especially round about the pinnacles.
Cwm Dyli was the scene in 1875 of one of the strangest of all the disasters which have happened on the mountain.
The Birmingham reservoir is to submerge several miles of this cwm and the two houses in which Shelley stayed.
So they proceeded to the place where was the Owl of Cwm Cawlwyd.The Mabinogion|Lady Charlotte Guest
British Dictionary definitions for cwm
Word Origin and History for cwm
1853, from Welsh cwm "coomb" (see coomb).