Where does “blackthorn” come from?

Blackthorn is a compound of black and thorn in English, with black deriving from Middle English black, Old English blæc, Old Norse bleikr, and Proto-Indo-European bʰleyǵ- meaning to shine or gleam.

blackthorn (English): A large shrub or small tree, "Prunus spinosa",...

Definitions

  1. A large shrub or small tree, "Prunus spinosa",...

Ancestry of “blackthorn”, step by step

blackthorn traces back through two separate lines of ancestry.

via English thorn

StepLanguageWordMeaning
1EnglishthornA sharp protective spine of a plant; Any shrub or...
2Middle EnglishþornAlternative form of thorn
3Old Englishþornthorn; thorny bush; the runic character ᚦ; the...
4Proto-West Germanicþornthorn, briar
5Proto-Germanicþurnuzthorn, briar
6Proto-Indo-Europeantr̥nóssharp, stiff
7Proto-Indo-European(s)ter-strong, firm, stiff, rigid; rigid, stiff; to...

via English Black

StepLanguageWordMeaning
1EnglishBlackAlternative letter-case form of black
2Old Frenchblancwhite
3Late Latinblancuswhite
4Frankishblankbright; gleaming, white, blinding; bright,...
5Proto-Germanic*blank
6Proto-Germanicblankazbright, shining, white, gleaming, blinding
7Proto-Indo-Europeanbhleg-to shine, white; to shine, burn, scorch

Words derived from “blackthorn

Every word from Proto-Indo-European (s)ter-Every word from Proto-Indo-European tr̥nósEvery word from Proto-Germanic þurnuz