An introductory textbook; a preparatory coating applied before painting.
From Medieval Latin 'primarius' meaning 'first, primary.' The educational sense (basic textbook) dates to the 14th century, while the paint preparation sense developed in the 19th century. Both meanings emphasize the foundational, preparatory nature.
The two pronunciations of primer reveal its dual identity - 'PRIM-er' for the paint undercoat and 'PRY-mer' for the basic textbook. Both prepare a surface for something better to come, whether that's paint or knowledge.
Complete word intelligence in one call. Free tier — 50 lookups/day.