nondemented

Etymology tree
English non-
Proto-Indo-European *de
Proto-Indo-European *-h₁
Proto-Indo-European *déh₁
Proto-Italic *dē
Vulgar Latin dē
Vulgar Latin dē-
Proto-Indo-European *men-
Proto-Indo-European *-tis
Proto-Indo-European *méntis
Proto-Italic *mentis
Vulgar Latin mēns
Vulgar Latin dēmēns
Proto-Indo-European *-h₂
Proto-Indo-European *-éh₂
Proto-Indo-European *-yéti
Proto-Indo-European *-eh₂yéti
Proto-Italic *-āō
Vulgar Latin -ō
Vulgar Latin dēmentōder.
English dement
Old English -ed
▲
Proto-Indo-European *-éh₂
Proto-Indo-European *-tós
Proto-Indo-European *-eh₂tos
Proto-Germanic *-ōdaz
Old English -od
Middle English -ed
English -ed
English demented
English nondemented
From non- + demented.