Where does “tailbone” come from?

Tailbone comes from English tail and bone, with bone tracing to Middle English bon, Old English bān, Proto-Germanic bainą, and Proto-Indo-European deḱ-.

tailbone (English): The final fused vertebrae at the base of the...

Definitions

  1. The final fused vertebrae at the base of the...

Ancestry of “tailbone”, step by step

tailbone traces back through two separate lines of ancestry.

via English Bône

StepLanguageWordMeaning
1EnglishBônenow known as Annaba
2Middle Englishbonbone
3Old Englishbānbone, tusk; the bone of a limb
4Arabicبانto separate, to become distinct, to sunder; to be...
5Ottoman Turkishبانban; keeper, tender, ward; ben tree, horseradish...
6Ottoman Turkishباڭ
7Persianبنگhashish, narcotic made from "Cannabis sativa";...
8Middle Persian𐭡𐭭𐭢henbane

via English Tail

StepLanguageWordMeaning
1EnglishTailA Chinese constellation coinciding with the tail of Scorpius, one of the 28 lunar mansions and the tail of Azure Dragon
2Middle EnglishtaylA tail; The back side or reverse of a creature; A...
3Old Englishtæġltail
4Proto-Germanictagląhair; ponytail; hair of a tail; tail
5Proto-Indo-Europeandoḱ-hair of the tail
6Proto-Indo-Europeandeḱ-take; perceive
Every word from Middle Persian 𐭡𐭭𐭢