The term 'not very bright' can be described by a variety of words, such as 'DOPEY', 'DIM', 'DENSE', 'DRAB', 'STUPID', 'PALE', and 'MORONIC'. Each of these words has a different meaning, but all of them imply that someone is not very intelligent. DOPEY means slow-witted or foolish, DIM implies a lack of intelligence, DENSE suggests a lack of understanding, DRAB implies dullness, STUPID implies a lack of common sense, PALE implies a lack of knowledge, and MORONIC implies a lack of mental capacity. All of these words can be used to describe someone who is not very bright.