Q. What is the Spanish word for idea?
The Spanish word for “idea” is also “idea”, spelled exactly the same way as it is spelled in English. How to say “idea” in Spanish is where the difference comes in. The Spanish pronunciation of idea is EE-DAY-AH, with the emphasis on the second syllable — ee-DAY-ah.
Click the blue arrow to the right to listen to a pronunciation (from forvo.com):