Where does “unretrainable” come from?

unretrainable (English) comes from English retrainable, from English retrain, from English train, from Middle English train, from Old French train, from Old French traïner, from Vulgar Latin traginare, from Latin tragēre — to run.

unretrainable (English): Not capable of being retrained

Definitions

  1. Not capable of being retrained

Ancestry of “unretrainable”, step by step

unretrainable traces back through two separate lines of ancestry.

via English retrainable

StepLanguageWordMeaning
1EnglishretrainableCapable of being retrained
2EnglishretrainTo train again; especially, to train or study in...
3EnglishtrainElongated portion; Connected sequence of people...
4Middle Englishtrain
5Old Frenchtraina delay, a drawing out
6Old FrenchtraïnerAlternative form of trainer; to pull out, to draw
7Vulgar Latintraginarepresent active infinitive of *traginō
8Latintragēre
9Latintraheresecond-person singular future passive indicative...
10LatintrahoI drag, pull; I trail; I extract, withdraw
11Proto-Italictraɣō
12Proto-Indo-Europeantregʰ-to drag, pull?; to run, walk
13Proto-Indo-Europeandʰregʰ-to run

via English un

StepLanguageWordMeaning
1EnglishunOne
Every word from Proto-Indo-European dʰregʰ-Every word from Proto-Indo-European tregʰ-Every word from Proto-Italic traɣō