having or showing unaffected simplicity of nature or absence of artificiality; unsophisticated; ingenuous.

having or showing a lack of experience, judgment, or information; credulous

She's so naive she believes everything she reads. He has a very naive attitude toward politics.

having or marked by a simple, unaffectedly direct style reflecting little or no formal training or technique

valuable naive 19th-century American portrait paintings.

not having previously been the subject of a scientific experiment, as an animal.

adjective

experienced , leery , skeptical , wise

adjective

aboveboard , artless , callow , candid , confiding , countrified , credulous , forthright , frank , fresh , green * , guileless , gullible , harmless , ignorant , impulsive , ingenuous , innocent , innocuous , instinctive , jejune , lamb , like a babe in the woods , natural , open , original , patsy * , plain , simple , simple-minded , sincere , spontaneous , square , sucker , unaffected , unjaded , unpretentious , unschooled , unsophisticated , unsuspecting , unsuspicious , untaught , unworldly , virgin , wide-eyed , unstudied , dupable , exploitable , susceptible , childish , green , inexperienced , trusting , unassuming , unfeigned , unphilosophic

noun

babe , child , ingnue