Where does “trainhopping” come from?

trainhopping (English) comes from English train, from Middle English train, from Old French train, from Old French traïner, from Vulgar Latin traginare, from Latin tragēre, from Latin trahere, from Latin traho — to run.

Ancestry of “trainhopping”, step by step

trainhopping traces back through two separate lines of ancestry.

via English train

StepLanguageWordMeaning
1EnglishtrainElongated portion; Connected sequence of people...
2Middle Englishtrain
3Old Frenchtraina delay, a drawing out
4Old FrenchtraïnerAlternative form of trainer; to pull out, to draw
5Vulgar Latintraginarepresent active infinitive of *traginō
6Latintragēre
7Latintraheresecond-person singular future passive indicative...
8LatintrahoI drag, pull; I trail; I extract, withdraw
9Proto-Italictraɣō
10Proto-Indo-Europeantregʰ-to drag, pull?; to run, walk
11Proto-Indo-Europeandʰregʰ-to run

via English hopping

StepLanguageWordMeaning
1Englishhoppinghop picking, the practice of picking hops; for...
2Middle Frenchhoubelon
Every word from Proto-Indo-European dʰregʰ-
trainhopping — Etymology, Origin & Word History | Etymology Explorer