uneducated

/ˌʌnˈɛdʒəkeɪtɪd/
adjective
  1. Having received little or no formal education; lacking knowledge or training in a particular area.
    • Her uneducated guess about the stock market turned out to be surprisingly accurate.
    • Although he was uneducated, he taught himself to read and write.
    • Many uneducated workers struggle to find well-paying jobs.