Where does “lavishness” come from?

Lavishness comes from Middle English -nesse, Old English -nes, and Proto-Germanic -inassuz, forming an abstract noun suffix that creates quality nouns from adjectives.

lavishness (English): The state or characteristic of being lavish

Definitions

  1. The state or characteristic of being lavish

Ancestry of “lavishness”, step by step

lavishness traces back through two separate lines of ancestry.

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

via English lavish

StepLanguageWordMeaning
1EnglishlavishExpending or bestowing profusely; profuse;...
2Middle Englishlaves
3Old Frenchlavassetorrent of rain
Every word from Proto-Indo-European néh₂sEvery word from Proto-Germanic nasjąEvery word from Old English næs