The letter “x” often symbolizes something unknown, with an air of mystery that can be appealing. Illustration by Meilan Solly Even though “x” is one of the least-used letters in the ...

Out of a total of 308,000 entries in the Oxford English Dictionary, just 366 words begin with the letter "x", and very few of those make it into most people's vocabulary.

The Riddles of the Sphinx. By Anna Shechtman.HarperOne; 288 pages; $29.99 and £22. W hat is a three-letter word for “preppy, party-loving, egotistical male, in modern lingo”? Answer: “Bro ...