## Etymology
Formed from the verb derange plus the suffix -ment; derange is from French déranger, from Old French desrengier ('to disarrange, throw into disorder'), from des- ('apart') plus rengier ('to put in a row'), from reng ('row, line'), of Germanic origin.

## AI Etymology
Derangement has the etymological history Formed from the verb derange plus the suffix -ment; derange is from French déranger, from Old French desrengier ('to disarrange, throw into disorder'), from des- ('apart') plus rengier ('to put in a row'), from reng ('row, line'), of Germanic origin. The ancestry passes through Old French desrengier and Proto-Germanic *hringaz. In present use as a noun, it means "a state of disorder or insanity; mental disturbance", keeping the historical formation close to the word's ordinary semantic work. Related words include derange, deranged, and arrange.

## Topics
- Mind & Cognition
- Word Formation & Derivatives

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