de·ment | \ də̇ˈment , dēˈ- \
-ed/-ing/-s

Definition of dement 

(Entry 1 of 2)

archaic

: to deprive of reason

dement

noun
\ " \
plural -s

Definition of dement (Entry 2 of 2)

: one who is demented

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History and Etymology for dement

Transitive verb

Late Latin dementare, from Latin dement-, demens out of one's mind, mad, from de- + ment-, mens mind

Noun

Middle French, from Latin dement-, demens

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