Synonyms: dim-witted, simple, simple-minded
Definition: lacking mental capacity and subtlety
Similar words: retarded
Definition: relatively slow in mental or emotional or physical development
Usage: providing a secure and sometimes happy life for the retarded
Synonyms: simple-minded
Definition: lacking subtlety and insight
Usage: a simple-minded argument
Definition: marked by or showing unaffected simplicity and lack of guile or worldly experience
Usage: 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