DictionaryRoot: rengier
Old French
rengier
put into line
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noun
derangement
dih-RAYNJ-munt/dɪˈreɪndʒmənt/
Disruption of a normal arrangement.
Etymology
Undoing the act of putting things into line gives the image of throwing order into confusion. A general disturbance of order later came to mean disturbance of the intellect or reason.