More cretinous is a harsh phrase used to describe individuals who display a lack of intelligence or understanding. While it is commonly used to criticize people, there are other ways to convey this idea using synonyms. For instance, terms like dim-witted, dense, and dull-witted can be used to describe someone who is not very bright. The words obtuse, slow-witted, and ignorant also convey the same meaning. These synonyms are less harsh and can be used in situations where a professional or polite tone is needed. It is important to choose these words thoughtfully to avoid offending anyone.