‘[Middle English] This was a word in Middle English for a person of low intelligence: it came via Old French from Latin idiota ‘ignorant person’, […].’ From the Ancient Greek ἰδιώτης (idiotes) meaning a private person who is not engaged or interested in public and political affairs.
– Chantrell. G. edt. 2002. The Oxford Essential Dictionary of World Histories New York, United States: Berkley Publishing Group (2003) p. 260