Where does “dementedness” come from?

dementedness (English) comes from English demented, from English dement, from Latin demento, from Latin dēmēns, from Latin dē-, from Latin dē, from Latin post, from Latin poste — afterwards, post; by, at.

dementedness (English): The quality of being demented

Definitions

  1. The quality of being demented

Ancestry of “dementedness”, step by step

dementedness traces back through two separate lines of ancestry.

via English demented

StepLanguageWordMeaning
1EnglishdementedInsane or mentally ill; Suffering from dementia;...
2Englishdementinsane, demented; An insane person, or one...
3LatindementoI make mad or crazy, drive crazy; I bewitch; I...
4Latindēmēnsout of one’s mind or senses: mad, raving, insane, crazy; more generally: foolish, reckless, distracted, infatuated
5Latindē-of; from
6Latinof; concerning; about
7Latinpostbehind; after, since, besides, except; behind,...
8Latinposteablative singular of postis
9Proto-Italicpostibehind, after
10Proto-Indo-Europeanpóstiafter
11Proto-Indo-Europeanpósafterwards, post; by, at

via English Ness

StepLanguageWordMeaning
1EnglishNessAn Ulster princess and the mother of Conchobar mac Nessa and Findchoem in the Ulster Cycle of Irish mythology. Daughter of Eochaid Sálbuide. Also the mother of Cormac Cond Longas by incest with Conchobar mac Nessa
2Middle Englishnesse
3Old Englishnæsnot, not at all; not; first/third-person singular...
4Proto-Germanicnasjąfoothill; headland; cape
5Proto-Indo-Europeannéh₂snose
Every word from Proto-Indo-European pós
dementedness — Etymology, Origin & Word History | Etymology Explorer