Synonyms of the word

simple-minded

• adj. Lacking subtlety or sophistication.
• adj. Lacking mental capacity; feeble-minded.

dim-witted

• adj. Being a dimwit; stupid; foolish; simple.

half-witted

• adj. Having a low intelligence; dim-witted.

naif

• adj. Naive.
• n. One who is naive.

naive

• adj. Lacking worldly experience, wisdom, or judgement; unsophisticated; against better judgement.
• adj. (of art) Produced in a simple, childlike style, deliberately rejecting sophisticated techniques.
• adj. (computing) Intuitive; designed to follow the way ordinary people approach a problem.

retarded

• adj. Delayed; delayed in development, hindered; impeded.
• adj. (psychology, now offensive, dated) Having mental retardation; mentally deficient or underdeveloped.
• adj. (psychology, now offensive, dated) Specifically, having an IQ below 70.
• adj. (colloquial, derogatory, offensive) Stupid, dumb.
• adj. (physics) Designating a parameter of an electromagnetic field which is adjusted to account for the finite…
• v. simple past tense and past participle of retard.

simple

• adj. Uncomplicated; taken by itself, with nothing added.
• adj. Without ornamentation; plain.
• adj. Free from duplicity; guileless, innocent, straightforward.
• adj. Undistinguished in social condition; of no special rank.
• adj. (now rare) Trivial; insignificant.
• adj. (now colloquial) Feeble-minded; foolish.
• adj. (heading, technical) Structurally uncomplicated.
• adj. (obsolete) Mere; not other than; being only.
• n. (medicine) A preparation made from one plant, as opposed to something made from more than one plant.
• n. (obsolete) A term for a physician, derived from the medicinal term above.
• n. (logic) A simple or atomic proposition.
• n. (obsolete) Something not mixed or compounded.
• n. (weaving) A drawloom.
• n. (weaving) Part of the apparatus for raising the heddles of a drawloom.
• n. (Roman Catholicism) A feast which is not a double or a semidouble.
• v. (transitive, intransitive, archaic) To gather simples, i.e., medicinal herbs.