Where does “rattail” come from?

rattail (English) comes from English rat, from Middle English raat, from Old English ræt, from Old English rætt, from Proto-Germanic rattaz, from Proto-Indo-European Hreh₃d- — to scrape.

rattail (English): Any of the large dark-colored deep-sea fish of...

Definitions

  1. Any of the large dark-colored deep-sea fish of...

Ancestry of “rattail”, step by step

rattail traces back through two separate lines of ancestry.

via English rat

StepLanguageWordMeaning
1EnglishratA medium-sized rodent belonging to the genus...
2Middle EnglishraatAlternative form of ratte
3Old EnglishrætAlternative form of rætt
4Old Englishrættrat
5Proto-Germanicrattazrat
6Proto-Indo-EuropeanHreh₃d-to scrape

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 Hreh₃d-Every word from Proto-Germanic rattazEvery word from Old English rætt