Where does “subterraneousness” come from?

subterraneousness (English) comes from English subterraneous, from Latin subterraneus, from Latin sub-, from Proto-Indo-European upó, from Proto-Indo-European h₃ewp-.

subterraneousness (English): The state or condition of being subterraneous

Definitions

  1. The state or condition of being subterraneous

Ancestry of “subterraneousness”, step by step

subterraneousness traces back through two separate lines of ancestry.

via English subterraneous

StepLanguageWordMeaning
1EnglishsubterraneousSubterranean
2Latinsubterraneusunderground, subterranean
3Latinsub-under, sub
4Proto-Indo-Europeanupóunder, below
5Proto-Indo-Europeanh₃ewp-

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 h₃ewp-Every word from Proto-Indo-European upóEvery word from Latin sub-