third person singular present tense of dement; or a plural noun referring to people who are demented.
From 'dement' as a verb + '-s' (third person singular marker), or as a plural noun. Standard English grammatical formation from the Latin-derived verb.
The fact that we can use 'dement' as a verb is fascinating — it's about doing something to someone's mind, which reflects how ancient people understood madness as something that happens.
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