Where does “thoroughbreed” come from?

thoroughbreed (English) comes from English breed, from Middle English breden, from Old English brēdan, from Proto-Germanic brōdijaną, from Proto-Indo-European bʰreh₁- — warm; breath, mist, vapour, steam.

thoroughbreed (English): A breed of unadulterated or pure lineage

Definitions

  1. A breed of unadulterated or pure lineage

Ancestry of “thoroughbreed”, step by step

thoroughbreed traces back through two separate lines of ancestry.

via English breed

StepLanguageWordMeaning
1EnglishbreedTo produce offspring sexually; to bear young; To...
2Middle EnglishbredenAlternative form of breiden; to make broad;...
3Old Englishbrēdanto bear offspring
4Proto-GermanicbrōdijanąTo keep warm; brood; To breed
5Proto-Indo-Europeanbʰreh₁-warm; breath, mist, vapour, steam

via English thorough

StepLanguageWordMeaning
1EnglishthoroughPainstaking and careful not to miss or omit any...
2Middle Englishþoruȝ
3Old EnglishþuruhAlternative form of þurh; through
Every word from Proto-Indo-European bʰreh₁-Every word from Proto-Germanic brōdijanąEvery word from Old English brēdan