Idiot is indirectly
borrowed from the
Greek noun
idiōtēs 'a private person, individual' (as opposed to the state), 'a
private citizen' (as opposed to someone with a political office), 'a common man', 'a person lacking professional skill, layman', later 'unskilled', 'ignorant', derived from the adjective
idios 'personal' (not public, not shared). In
Latin,
idiota was borrowed in the meaning 'uneducated', 'ignorant', 'common', and in
Late Latin came to mean 'crude, illiterate, ignorant'. In
French, it kept the meaning of 'illiterate', 'ignorant', and added the meaning 'stupid' in the 13th century. In English, it added the meaning 'mentally deficient' in the 14th century. This interpretation was foreshadowed in 1846, when
Julius Hare wrote that the meaning of
idiotes as "rude, ignorant person" bore witness to the "Greek notion of the indispensableness of public life". But this is not how the Greeks used the word. However, neither he nor any other ancient author uses the word "idiot" to describe non-participants, or in a derogatory sense; its most common use was simply a private citizen or amateur as opposed to a government official, professional, or expert. The derogatory sense came centuries later, and was unrelated to the political meaning. == Disability and early classification and nomenclature==