unschooled

adjective

1. not schooled, taught, or trained: Though unschooled, he had a grasp of the subject.
2. not acquired or artificial; natural: an unschooled talent.

adjective

1. having received no training or schooling
2. spontaneous; naturalunschooled talent

adj.1580s, “untrained,” from un- (1) “not” + past participle of school (v.).