amnesia

/æmˈniːʒə/

am·nesia

BrE /æmˈniːziə/

NAmE /æmˈniːʒə/

[U]

a medical condition in which sb partly or completely loses their memory

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am·nesiac

BrE /æmˈniːziæk/

NAmE /æmˈniːʒiæk/

This new discovery helps amnesiacs keep their memory.