Where does “bloodletting” come from?

Bloodletting is a compound of English blood and English let, derived from Old English blōd and Old English lǣtan, both ultimately tracing to Proto-Indo-European roots bʰleh₃- and bʰel-.

bloodletting (English): The archaic practice of treating illness by...

Definitions

  1. The archaic practice of treating illness by...

Ancestry of “bloodletting”, step by step

bloodletting traces back through two separate lines of ancestry.

via English Blood

StepLanguageWordMeaning
1EnglishBloodA member of the Los Angeles gang The Bloods
2Middle Englishbloodblood
3Old Englishblōdblood
4Proto-West Germanicblōdblood
5Proto-Germanicblōþąblood
6Proto-Indo-Europeanbʰleh₃-bloom, flower
7Proto-Indo-Europeanbʰel-to sound; to speak, roar, bark; shiny, white; to...
8Proto-Indo-Europeanbʰōl-

via English letting

StepLanguageWordMeaning
1Englishlettingpresent participle of let; The rental of...
2EnglishletTo allow to, not to prevent; To leave; To allow...
3Middle Englishletento let
4Old Englishlǣtanto let; leave; to let go, leave; to allow, let...
5Proto-West Germaniclātanto let, to allow; to leave alone
6Proto-Germaniclētanąto let, to allow; to leave alone
7Proto-Indo-Europeanleh₁d-to be tired
Every word from Proto-Indo-European bʰōl-Every word from Proto-Indo-European bʰel-Every word from Proto-Indo-European bʰleh₃-