uneducated

adj.没受教育的；文盲的；无知的；缺乏教养的

You can tell from his gross language that the man was uneducated. 从他那粗俗的语言可以看出，这个人没受过教育。

He's rough and uneducated, but his heart is in the right place. 他很粗鲁又没文化，可他心肠不坏。

But I knew his uneducated guess was low. 但我知道他无知的估算过低。