Answer: moronic

AnswerCrossword Clue
MORONICNot very bright
moronicpertaining to a moron (a mentally deficient person)
moronicstupid person
MORONICCompletely stupid
MORONICSenseless
MORONICHalf-baked
MORONICNinnylike
MORONICIncredibly stupid
MORONICDumb
MORONICAsinine
MORONICFoolish
MORONICStupid
MORONICThickheaded
MORONICDull
MORONICInane.
MORONICOf twelve-year-old mentality.
MORONICDense
MORONICBrainless
MORONICReally dumb
MORONICJust plain dumb
MORONICFeeble