simpleminded

or sim·ple-mind·ed

[ sim-puhl-mahyn-did, -mahyn- ]
/ ˈsɪm pəlˈmaɪn dɪd, -ˌmaɪn- /
SEE SYNONYMS FOR simpleminded ON THESAURUS.COM

adjective

free of deceit or guile; artless or unsophisticated.
lacking in mental acuteness or sense.
mentally deficient.

Origin of simpleminded

First recorded in 1735–45; simple + minded

OTHER WORDS FROM simpleminded

sim·ple·mind·ed·ly, adverb sim·ple·mind·ed·ness, noun

Words nearby simpleminded

simple time, simple transcendental extension, simple vow, simple-hearted, simple-minded, simpleminded, simpleton, simplex, simplex method, simplicidentate, simplicity

Words related to simple minded

innocent, simple, sincere, ignorant, unsophisticated, wide-eyed, stupid, silly, tedious, dim, slow, boring, dumb, sluggish, foolish, dull, illiterate, amateur, shallow, imbecile