They're known as man's best friends, fur babies, pooches. But the most widely used word for these beloved animals — "dog" — is also a great linguistic mystery. "The most everyday, commonplace words ...

The word "deadline" has been used a lot in reference to tariffs. It got us thinking: what is the origin of the word? NPR's Scott Simon talks with Benjamin Dreyer, author of "Dreyer's English." The ...