a person lacking in intelligence
simpleton - idiot
A ‘simpleton’ is a person lacking intellect and common sense. Such people typically do not have the ability to use reason and comprehend things easily. It is important to note that the term is not simply related to education. Somebody can have qualifications but still be regarded as a simpleton if they are overly naive and unwise. Often used as an insult.
Claire always feels she has to explain things to me multiple times. She must think I’m a bit of a simpleton.
To make sure that there are no misunderstandings, I wrote the report in basic language that even a simpleton could comprehend.
Please don’t pair me up with Owen for the project. The man is a total simpleton!