Where does “viperousness” come from?

viperousness (English) comes from English viperous, from English -ous, from Middle English -ous, from Old French -us, from Latin -ōsus, from Old Latin -ōssus.

viperousness (English): The quality of being viperous

Definitions

  1. The quality of being viperous

Ancestry of “viperousness”, step by step

viperousness traces back through two separate lines of ancestry.

via English viperous

StepLanguageWordMeaning
1Englishviperousof or pertaining to a viper; venomous, malicious...
2English-ousUsed to form adjectives from nouns, to denote...
3Middle English-ous
4Old French-us-ous, used for forming adjectives
5Latin-ōsusose, -ous, -ful (full of or overly prone to)
6Old Latin-ōssus

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 Old Latin -ōssus