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English definition of “simple”

simple

adjective (FOOLISH)    /ˈsɪm.pl̩/
describes a person who does not have a normal level of intelligence : He's a bit simple, I'm afraid .Naive and trustingInexperienced (of people)
(Definition of simple adjective (FOOLISH) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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