Antonyms of adj intelligent

4 senses of intelligent

Sense 1
intelligent (vs. unintelligent) -- (having the capacity for thought and reason especially to a high degree; "is there intelligent life in the universe?"; "an intelligent question")

unintelligent (vs. intelligent), stupid -- (lacking intelligence; "a dull job with lazy and unintelligent co-workers")
        => brainless, headless -- (not using intelligence)

Sense 2
intelligent, well-informed -- (possessing sound knowledge; "well-informed readers")

INDIRECT (VIA sophisticated) -> naive, naif -- (marked by or showing unaffected simplicity and lack of guile or worldly experience; "a teenager's naive ignorance of life"; "the naive assumption that things can only get better"; "this naive simple creature with wide friendly eyes so eager to believe appearances")

Sense 3
healthy, intelligent, levelheaded, level-headed, sound -- (exercising or showing good judgment; "healthy scepticism"; "a healthy fear of rattlesnakes"; "the healthy attitude of French laws"; "healthy relations between labor and management"; "an intelligent solution"; "a sound approach to the problem"; "sound advice"; "no sound explanation for his decision")

INDIRECT (VIA reasonable) -> unreasonable -- (not reasonable; not showing good judgment)

Sense 4
intelligent, reasoning (prenominal), thinking (prenominal) -- (endowed with the capacity to reason)

INDIRECT (VIA rational) -> irrational -- (not consistent with or using reason; "irrational fears"; "irrational animals")

Similarity of adj intelligent

4 senses of intelligent

Sense 1
intelligent (vs. unintelligent) -- (having the capacity for thought and reason especially to a high degree; "is there intelligent life in the universe?"; "an intelligent question")
       => agile, nimble -- (mentally quick; "an agile mind"; "nimble wits")
       => apt, clever -- (mentally quick and resourceful; "an apt pupil"; "you are a clever man...you reason well and your wit is bold"-Bram Stoker)
       => brainy, brilliant, smart as a whip -- (having or marked by unusual and impressive intelligence; "some men dislike brainy women"; "a brilliant mind"; "a brilliant solution to the problem")
       => bright, smart -- (characterized by quickness and ease in learning; "some children are brighter in one subject than another"; "smart children talk earlier than the average")
       => natural, born (predicate), innate (predicate) -- (being talented through inherited qualities; "a natural leader"; "a born musician"; "an innate talent")
       => quick, ready -- (apprehending and responding with speed and sensitivity; "a quick mind"; "a ready wit")
       => prehensile -- (having a keen intellect; "poets--those gifted strangely prehensile men"- A.T.Quiller-Couch)
       => scintillating -- (brilliantly clever; "scintillating wit"; "a play full of scintillating dialogue")
       => searching, trenchant -- (having keenness and forcefulness and penetration in thought, expression, or intellect; "searching insights"; "trenchant criticism")
          Also See-> precocious#1; smart#1

Sense 2
intelligent, well-informed -- (possessing sound knowledge; "well-informed readers")
       => sophisticated (vs. naive) -- (having or appealing to those having worldly knowledge and refinement and savoir-faire; "sophisticated young socialites"; "a sophisticated audience"; "a sophisticated lifestyle"; "a sophisticated book")

Sense 3
healthy, intelligent, levelheaded, level-headed, sound -- (exercising or showing good judgment; "healthy scepticism"; "a healthy fear of rattlesnakes"; "the healthy attitude of French laws"; "healthy relations between labor and management"; "an intelligent solution"; "a sound approach to the problem"; "sound advice"; "no sound explanation for his decision")
       => reasonable (vs. unreasonable), sensible -- (showing reason or sound judgment; "a sensible choice"; "a sensible person")

Sense 4
intelligent, reasoning (prenominal), thinking (prenominal) -- (endowed with the capacity to reason)
       => rational (vs. irrational) -- (consistent with or based on or using reason; "rational behavior"; "a process of rational inference"; "rational thought")