Where does “underneathness” come from?

underneathness (English) comes from English underneath, from Middle English undernethe, from Old English underneoþan, from Old English under, from Proto-Germanic under, from Proto-Indo-European h₁entér, from Proto-Indo-European h₁en — in; in, inside.

underneathness (English): The quality of being underneath; A space that is...

Definitions

  1. The quality of being underneath; A space that is...

Ancestry of “underneathness”, step by step

underneathness traces back through two separate lines of ancestry.

via English underneath

StepLanguageWordMeaning
1EnglishunderneathBelow; in a place beneath; On the underside or...
2Middle Englishundernethe
3Old Englishunderneoþanunderneath
4Old Englishunderunder, beneath
5Proto-Germanicunderamong, between; under, beneath; under
6Proto-Indo-Europeanh₁entérbetween
7Proto-Indo-Europeanh₁enin; in, inside

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 h₁en
underneathness — Etymology, Origin & Word History | Etymology Explorer