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English Lexicon

Idiocy

/ˈɪd.i.ə.si/
nounCEFR C1 (Advanced)Top #14500 frequency
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Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    Behavior or a decision that is extremely stupid and shows a complete lack of good judgment.

    "Leaving the front door wide open while going on a two-week vacation was sheer idiocy."
  2. 2

    A state of profound intellectual disability or mental deficiency (historical and clinical usage).

    "Older medical literature frequently used the term idiocy to classify the lowest level of intellectual development."
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Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

Derived from the Greek word 'idiōteia', meaning ignorance or lack of professional knowledge, stemming from 'idiōtēs' (private person or layperson). It entered Middle English via Old French and medieval Latin, initially denoting extreme mental deficiency in clinical contexts before shifting in modern usage to describe extraordinarily foolish behavior or ideas.

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