Where does “ultroneousness” come from?

ultroneousness (English) comes from English ultroneous, from Latin ultroneus, from Latin -eus, from Ancient Greek -εῖος, from Proto-Indo-European -iHwós, from Proto-Indo-European -wós — Creates adjectives from verb stems.

ultroneousness (English): The state or quality of being ultroneous;...

Definitions

  1. The state or quality of being ultroneous;...

Ancestry of “ultroneousness”, step by step

ultroneousness traces back through two separate lines of ancestry.

via English ultroneous

StepLanguageWordMeaning
1Englishultroneousspontaneous; voluntary
2Latinultroneusvoluntary; deliberate
3Latin-eusargentum + API → argenteus; ferrum + API →...
4Ancient Greek-εῖοςForms adjectives, usually with a meaning of "of"...
5Proto-Indo-European-iHwós
6Proto-Indo-European-wósCreates adjectives from verb stems

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 -wósEvery word from Latin -eusEvery word from Ancient Greek -εῖος