Where does “unappropriateness” come from?

unappropriateness (English) comes from English unappropriate, from English appropriate, from Middle English appropriaten, from Latin appropriatus, from Latin approprio, from Latin ad-, from Latin īn-, from Latin în — in.

Ancestry of “unappropriateness”, step by step

unappropriateness traces back through two separate lines of ancestry.

via English unappropriate

StepLanguageWordMeaning
1EnglishunappropriateTo take from private possession; to restore to...
2EnglishappropriateSuitable or fit; proper; Suitable to the social...
3Middle Englishappropriaten
4Latinappropriatus
5LatinapproprioI make it my own, appropriate
6Latinad-to; usually prefixed to verbs, in which cases it...
7Latinīn-un-, non-, not
8Latinînin, at, on, upon, from (space)
9Latinenlookǃ beholdǃ; reallyǃ?; come onǃ
10Proto-Italicenin
11Proto-Indo-Europeanh₁énin

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 h₁énEvery word from Latin īn-Every word from Latin ad-
unappropriateness — Etymology, Origin & Word History | Etymology Explorer