from The Century Dictionary.

  • noun A round valley-head inclosed on all sides but one by steep slopes; a corrie; a cirque. The typical cwms of the Welsh mountains have been shaped by glacial erosion.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A valley head created through glacial erosion and with a shape similar to an amphitheatre.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a steep-walled semicircular basin in a mountain; may contain a lake


from The American Heritage® Dictionary of the English Language, 4th Edition

[Welsh, valley.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Welsh cwm ("valley").


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  • esh, have you ever played hangman with a Welshman? :)

    December 18, 2006

  • You used this in hangman? Ooooh, that is pure evil. Was the person a professed logophile or know-it-all?

    February 19, 2007

  • See cirque and corrie

    January 26, 2008

  • My lips are sealed.

    October 8, 2008

  • This word came up when my English teacher claimed there were no words without vowels--she was surprised to learn about cwm! Our language hoovers up words from so many places you can find almost any odd example you can think of. I'd like us to start using the Amharic verb "machubchub" to describe the sound of swishing a liquid inside your mouth. :^ )

    June 15, 2011

  • I love machubchub!

    June 15, 2011

  • this one has been a boon in many a scrabble game

    February 11, 2012

  • How does one pronounce "cwm?"

    January 1, 2013

  • I suppose clicking on the pronunciation link after you have cleaned your ears would be a useful guide.

    January 1, 2013

  • Meg seeks cwm becks. 'Cwm' is possibly the only English word made solely of prime-numbered letters (bcegkmqsw) that doesn't contain an E. Seriously, does no-one have a list of prime-lettered words . . . or a word for them? (Primogram?)

    March 31, 2016

  • I nominate qroqqa to make that list for us!

    March 31, 2016

  • beseem emcees becks seems...

    The scrabble and anagram solver sites can help.

    March 31, 2016