Where does “vapour trail” come from?

vapour trail (English) comes from English trail, from Middle English trailen, from Old French trailler, from Vulgar Latin tragulare, from Latin trāgula — a javelin or dart having a throwing-strap (āmentum).

vapour trail (English): A contrail

Definitions

  1. A contrail

Ancestry of “vapour trail”, step by step

vapour trail traces back through two separate lines of ancestry.

via English trail

StepLanguageWordMeaning
1EnglishtrailTo follow behind (someone or something); to tail (someone or something)
2Middle Englishtrailento hang loosely, drag along, drag away
3Old Frenchtraillerto tow; pick up the scent of a quarry
4Vulgar Latintragulareto drag
5Latintrāgulaa javelin or dart having a throwing-strap (āmentum)

via English vapour

StepLanguageWordMeaning
1EnglishvapourBritish standard spelling of vapor
Every word from Latin trāgulaEvery word from Vulgar Latin tragulareEvery word from Old French trailler