Wordsmith.org's  AWAD (A Word A Day) email list is an excellent source of information about words. But one recent message could be misleading.

The word of the day was "cwm," pronounced "koom," a name for a glacier-gouged crater. The article explains what might appear to be a word without a vowel—"The letter w works as a vowel in the Welsh language and it has given another such word (without a standard vowel aeiou, or y) to English: crwth (krooth) meaning crowd."

It may be technically accurate to say that a crwth is a crowd, but it's seriously misleading—especially to non-British people.

A crwth is a stringed instrument, similar to a fiddle. A British term for the instrument is "crowd." As far as I know, crwth has nothing to do with a large group of people—unless they're at a fiddlers' convention.