Wordology, Portmanteau

[pawrt-man-toh] It would be a terrible shame if portmanteau were not itself a portmanteau. The word originally referred to a large traveling case made of stiff leather, derived from a combination of the French porter, meaning "to carry," and manteau, meaning "mantle" or "cloak."

The word's literary significance is the work of Lewis Carroll. In Through the Looking-Glass, Humpty Dumpty explains to Alice that the strange compound words she hears in Wonderland are "like a portmanteau--there are two meanings packed up into one word."