Where does “batshitness” come from?

batshitness (English) comes from English batshit, from English batty, from English bat, from French bât, from Old French bast, from Vulgar Latin bastum, from Latin bastāre, from Ancient Greek βαστάζω — to lift, lift up, raise; to bear, carry; to carry...

batshitness (English): The state or condition of being batshit;...

Definitions

  1. The state or condition of being batshit;...

Ancestry of “batshitness”, step by step

batshitness traces back through two separate lines of ancestry.

via English batshit

StepLanguageWordMeaning
1Englishbatshitfecal matter produced by bats; nonsense,...
2EnglishbattyMad, crazy, silly; Belonging to, or resembling, a...
3EnglishbatAny of the flying mammals of the order...
4Frenchbâtpacksaddle
5Old Frenchbastpacksaddle
6Vulgar LatinbastumA stick
7Latinbastāre
8Ancient Greekβαστάζωto lift, lift up, raise; to bear, carry; to carry...

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 Ancient Greek βαστάζωEvery word from Latin bastāreEvery word from Vulgar Latin bastum