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idiopathic
idiophone
idiosyncrasy
idiot
idiot board
idiot box
idiot card
idiot light
idiot mittens
idiot-proof
idiot savant
idiot tape
idiotic
IDK
idle
idle gear
idle pulley
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idiocy

id·i·o·cy [ íddee əssee ] (plural id·i·o·cies)


noun 
Definition:
 
1. an offensive term meaning extreme lack of intelligence or foresight

2. an offensive term for an extremely unintelligent or thoughtless act

3. an offensive term in a now disused classification system for mental disability ( dated )

[Early 16th century. <idiot]
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