derangement

Meanings

1. 1
   noun

   a state of disorder or insanity; mental disturbance

   The fever brought on a temporary derangement of his senses.

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.

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