What is the Opposite of Clever?

Because 'clever' implies a sharp, quick brain, the opposite must imply a slow or easily tricked brain. Here are the best antonyms:

1. Foolish / Stupid: The most direct opposites. (e.g., It was a clever plan, but a foolish mistake).
2. Dull: Used to describe a brain that is slow to understand things. (e.g., The clever student solved the puzzle instantly, but the dull student stared at it for an hour).
3. Naive / Gullible: Used when 'clever' means being tricky or cunning (like a fox). The opposite is someone innocent who gets tricked easily. (e.g., The clever thief easily robbed the naive tourist).

While Clever and Smart mean almost the exact same thing, 'Clever' sometimes has a slightly negative, tricky meaning (like a clever villain in a movie who lies and cheats successfully). If you are using clever in a negative way, a great opposite word is Honest or Straightforward.

• The clever dog learned to open the door, but the stupid dog kept barking at the wall.
• It was very clever of her to save money, but highly foolish of him to waste it all.