cwm
/kʊm/
noun
- A steep-walled, bowl-shaped hollow in a mountain, often containing a lake or glacier; a cirque.
- Glaciers carved deep cwms into the mountainsides during the last ice age.
- The hikers rested at the edge of the cwm, watching the small blue lake below the cliffs.
- From the summit, we could see several cwms filled with snow even in late summer.