What is the link between map and apron, acrobat and oxygen, zeal and jealousy, flour and pollen, secret and crime? Did you know that crimson originally comes from the name of tiny scale insects, the kermes, from whose dried bodies a red dyestuff is made? That Yankee began as a nickname for Dutchmen? That omelette evolved from amulette, "a thin sheet of metal," and is a not-too- distant cousin of the word laminate? That jeans find their antecedent in jean fustian, meaning "a cotton fabric from Genoa"?

The Dictionary of Word Origins uncovers the hidden and often surprising...