Where does “blackguard” come from?

Blackguard derives from English black and guard, with black tracing through Middle English black, Old English blæc, and Old Norse bleikr to Proto-Indo-European bʰleyǵ-, meaning to shine or burn.

blackguard (English): A scoundrel; an unprincipled contemptible person;...

Definitions

  1. A scoundrel; an unprincipled contemptible person;...

Ancestry of “blackguard”, step by step

blackguard traces back through two separate lines of ancestry.

via English guard

StepLanguageWordMeaning
1EnglishguardA person who, or thing that, protects or watches...
2Middle Englishgardeguardianship, safeguarding, covering, authority;...
3Old Frenchguardeprotection; act of protecting; guard; inflection...
4Old Frenchguarderto protect; to guard; to look at
5Frankishwardēnto protect; to guard, protect, watch over; to...
6Proto-Germanicwardānąto guard, protect, watch over
7Proto-Germanic*warduz
8Proto-Indo-Europeanwēr-true
9Proto-Indo-Europeanwer-to burn; to cover, heed, notice; squirrel

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 “blackguard

Every word from Proto-Indo-European wer-
blackguard — Etymology, Origin & Word History | Etymology Explorer