Where does “coattail” come from?

coattail (English) comes from English Tail, from Middle English tayl, from Old English tæġl, from Proto-Germanic taglą, from Proto-Indo-European doḱ-, from Proto-Indo-European deḱ- — take; perceive.

coattail (English): The flap at the back of a coat that hangs down,...

Definitions

  1. The flap at the back of a coat that hangs down,...

Ancestry of “coattail”, step by step

coattail traces back through two separate lines of ancestry.

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

via English coat

StepLanguageWordMeaning
1EnglishcoatAn outer garment covering the upper torso and...
2Middle EnglishcoteA coat, especially one worn as an undergarment or...
3Old Frenchcotteovershirt, tunic
4Frankishkottacoat
Every word from Proto-Indo-European deḱ-