Inspiration from weird sources

[eris404]

The "1001 non-gaming sites" thread and something else I came across today inspired this thread.

I googled "Dweomer" and came up with this nifty page, from Gregor's Word of the Week:

http://www.gregorpurdy.com/gregor/wow/000438.html

Rather than just give a definition of the word, it lists several definitions from different sources, etymology, interesting uses and other associated words. To quote:

From The Compact Edition of the Oxford English Dictionary, Volume 1 (A-O); 18th Printing, 1979; Library of Congress catalog number 76-188038:

Dweomercraeft. Obs. [f. O.E. *dwimer, *dweomer, in zedwimer, zedwomer, illusion, sourcery, necromancy, zedwinere, juggler, sourcerer + craeft, CRAFT.] Juggler, magic art.

c.1205 LAY. 30634 And Pelux hit wiste anan purh his dweomer-craeften.

Related: Dweomerlayk = Demerlayk.

From The Concise Oxford Dictionary of English Etymology; T.F. Hoad; ISBN 0-19-283098-8 (pbk).

Dwarf comes from the old English word dweorg/dweorgh/dwerg.

The stem 'werg-' means 'to do'. (Words and Rules, page 68).

From The Word Lover's Dictionary; Citadel Press, Josefa Heifetz, 1997; ISBN 0-8065-1720-4.

dwergma: "echo". Of Norse origin. Means Dwarf Language. Supposedly dwarves live in the rocks and are the source of the echoes

So in that page I found four or five things that gave me interesting ideas for my campaign. The other words of the week are pretty darn neat, too:

http://www.gregorpurdy.com/gregor/wow/

So, where have you found inspiration? What was the most unusual source? What source do you think is underused or overused?