dolt

/doʊlt/
noun
  1. A stupid or foolish person.
    • He felt like a dolt after realizing he had been looking for his glasses while they were on his head.
    • Only a dolt would leave their keys in the car with the engine running.
    • Don't be such a dolt — read the instructions before you start.
Antonyms
What does "dolt" mean? | whatsthatwordmean | whatsthatwordmean