simple-minded

Definitions of simple-minded
  1. adjective
    lacking subtlety and insight
    “a simple-minded argument”
    Synonyms:
    naif, naive
    marked by or showing unaffected simplicity and lack of guile or worldly experience
  2. adjective
    lacking mental capacity and subtlety
    synonyms: dim-witted, simple
    retarded
    relatively slow in mental or emotional or physical development
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