Where does “flagitiousness” come from?

flagitiousness (English) comes from English flagitious, from Old French flagitieux, from Latin flāgitium, from Latin -ium, from Latin -ius, from Proto-Italic -jōs, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

flagitiousness (English): The state or quality of being flagitious;...

Definitions

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

Ancestry of “flagitiousness”, step by step

flagitiousness traces back through two separate lines of ancestry.

via English flagitious

StepLanguageWordMeaning
1EnglishflagitiousGuilty of terrible crimes; wicked, criminal;...
2Old Frenchflagitieux
3Latinflāgitiumdisgraceful or shameful action, deed, or crime; scandal
4Latin-iumSuffix used to form abstract nouns, sometimes...
5Latin-iusforming adjectives from nouns; nominative neuter...
6Proto-Italic-jōsForms comparative adjectives
7Proto-Indo-European-yósCreates adjectives from noun or 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 -yósEvery word from Latin -iumEvery word from Latin -ius