What does "amentia" mean?

Mental impairment; state of being mentally handicapped.

Amentia

Common synonyms include: archaic label, arrested development, backwardness, blithering idiocy, cognitive impairment, cretinism.

/eɪˈmɛnʃə/ noun

noun ·Rare ·Advanced level

Noun

1
Mental impairment; state of being mentally handicapped. countable, uncountable
"Cretinism is a form of amentia, which is endemic in certain districts, especially in some of the valleys of Switzerland, Savoy, and France."
2
extreme mental retardation wordnet

"Cretinism is a form of amentia, which is endemic in certain districts, especially in some of the valleys of Switzerland, Savoy, and France."

From Latin āmentia (“madness; senselessness”), from āmēns (“mad, insane; foolish”), from ab (“from, away from”) + mēns (“mind”).