[adjective] lacking or marked by lack of intellectual acuity
[adjective] in a state of mental numbness especially as resulting from shock; "he had a dazed expression on his face"; "lay semiconscious, stunned (or stupefied) by the blow"; "was stupid from fatigue" Synonyms: dazed, stunned, stupefied
[adjective] without much intelligence; "a dull job with lazy and unintelligent co-workers" Synonyms: unintelligent