Uninsightful is a word that suggests a lack of knowledge, understanding, or perception. It can be used to describe a person, idea, or statement that fails to provide any valuable insight or reveal any deeper meaning. Some synonyms for uninsightful include unenlightening, uninformative, superficial, and shallow. These words convey a similar sense of criticism without being as harsh. Other options include uninformed, unintelligent, and unobservant, which suggest a lack of awareness or knowledge. Overall, synonyms for uninsightful can help to convey why something falls short in providing true wisdom or understanding.