Where does “luxuriantness” come from?

luxuriantness (English) comes from English luxuriant, from Latin luxurians, from Latin luxurio, from Latin luxuria, from Latin -ia, from Latin -ius, from Proto-Italic -jōs, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

luxuriantness (English): The state or quality of being luxuriant

Definitions

  1. The state or quality of being luxuriant

Ancestry of “luxuriantness”, step by step

luxuriantness traces back through two separate lines of ancestry.

via English luxuriant

StepLanguageWordMeaning
1EnglishluxuriantAbundant in growth or detail
2Latinluxuriansluxurious, abounding to excess; swelling,...
3LatinluxurioI am luxuriant, rank, abounding to excess; I have...
4Latinluxurialuxury; extravagance
5Latin-iaUsed to form a feminine abstract noun, usually...
6Latin-iusforming adjectives from nouns; nominative neuter...
7Proto-Italic-jōsForms comparative adjectives
8Proto-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 -iaEvery word from Latin -ius