From "mad as a wet hen" to "corn dodger" and "hobgoblin," Charles Funk's collections of curious words and expressions are a treasure trove of word origin. In a language where hearse and rehearse have the same root and the word dunce comes from a great philosopher, English has hundreds of everyday words that originated or acquired their meanings in unusual ways. Dictionaries don't have the space to tell us all the mysteries but now Dr. Funk, with humor...