dementia
US /dɪˈmen.ʃə/
UK /dɪˈmen.ʃə/

1.
dementie
a chronic or persistent disorder of the mental processes caused by brain disease or injury and marked by memory disorders, personality changes, and impaired reasoning.
:
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Early diagnosis of dementia can help manage its progression.
Vroege diagnose van dementie kan helpen de progressie ervan te beheersen.
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She is studying the effects of aging on dementia.
Ze bestudeert de effecten van veroudering op dementie.