uneducated
adj.having little or no formal schooling or training. It describes someone who has not had the chance to learn much at a school or university.
adj.lacking formal schooling or a standard level of academic instruction. Often carries a negative or judgmental connotation depending on the context.
“He was a smart man even though he was uneducated.”
“The charity provides basic literacy classes for uneducated adults in rural areas who never finished primary school.”
“While the critic dismissed the audience as uneducated, their intuitive grasp of the play's emotional core suggested a profound wisdom that formal schooling often fails to provide.”
Typically used attributively before a noun or predicatively after a linking verb like 'be' or 'remain'.
“They want uneducated women so they can't raise wise men.”
From un- + educated.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.