Words used to describe unintelligent people
silly adjective
showing that you are not intelligent, not serious, not thinking carefully etc
idiotic adjective
extremely stupid
unintelligent adjective
not intelligent
simple-minded adjective
unable to understand difficult or complicated ideas
slow-witted adjective
unable to understand things quickly and easily
slow adjective
not intelligent, so that you need a lot of time to understand simple things
brainless adjective
extremely stupid
thick adjective
stupid
empty-headed adjective
not sensible or intelligent
stupid adjective
not intelligent, or not able to consider or judge things carefully