Where does “mootness” come from?

mootness (English) comes from English moot, from English mutual, from Middle French mutuel, from Latin mūtuus, from Latin muto, from Latin -ium, from Latin -ius, from Proto-Italic -jōs — Creates adjectives from noun or verb stems.

mootness (English): The state or condition of being moot

Definitions

  1. The state or condition of being moot

Ancestry of “mootness”, step by step

mootness traces back through two separate lines of ancestry.

via English moot

StepLanguageWordMeaning
1EnglishmootSubject to discussion (originally at a moot); arguable, debatable, unsolved or impossible to solve
2EnglishmutualHaving the same relationship, each to each other;...
3Middle Frenchmutuelmutual
4Latinmūtuusborrowed, lent
5LatinmutoI move, remove; I alter, change, modify,...
6Latin-iumSuffix used to form abstract nouns, sometimes...
7Latin-iusforming adjectives from nouns; nominative neuter...
8Proto-Italic-jōsForms comparative adjectives
9Proto-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