Where does “tailend” come from?

tailend (English) comes from English End, from Middle English ende, from Old English ende, from Proto-Germanic andi, from Proto-Indo-European h₂énti, from Proto-Indo-European h₂énts, from Proto-Indo-European h₂ent-, from Proto-Indo-European h₂en- — on, onto.

Ancestry of “tailend”, step by step

tailend traces back through two separate lines of ancestry.

via English End

StepLanguageWordMeaning
1EnglishEndA key that when pressed causes the cursor to go...
2Middle EnglishendeThe end or finishing of a thing; the terminal...
3Old Englishendeend, limit, border, corner
4Proto-Germanicandiin addition, furthermore, and
5Proto-Indo-Europeanh₂éntiopposite; near; in front
6Proto-Indo-Europeanh₂éntsforehead; front
7Proto-Indo-Europeanh₂ent-face; forehead; front
8Proto-Indo-Europeanh₂en-on, onto

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 Proto-Indo-European h₂en-Every word from Proto-Indo-European h₂ent-Every word from Proto-Indo-European h₂énts
tailend — Etymology, Origin & Word History | Etymology Explorer