Where does “three-pronged” come from?

three-pronged (English) comes from English pronged, from English prong, from Middle English prōnge, from Middle Low German prange, from Middle Low German prangen, from Old Saxon *prangan, from Proto-West Germanic *prangan — to press.

three-pronged (English): Having three prongs or similar parts; trifurcate

Definitions

  1. Having three prongs or similar parts; trifurcate

Ancestry of “three-pronged”, step by step

three-pronged traces back through two separate lines of ancestry.

via English pronged

StepLanguageWordMeaning
1EnglishprongedHaving prongs
2EnglishprongA thin, pointed, projecting part, as of an antler...
3Middle Englishprōngeaffliction, agony, pain; pointed instrument
4Middle Low Germanprangepole, stake; kind of pillory or stocks; stick,...
5Middle Low Germanprangento press, pinch
6Old Saxon*prangan
7Proto-West Germanic*pranganto press

via English three

StepLanguageWordMeaning
1EnglishthreeA numerical value after two and before four....
2Middle Englishthrethree
3Old Englishþrīthree
4Proto-West Germanicþrīʀthree
5Proto-Germanicþrīzthree
6Proto-Indo-European*tréyes
Every word from Proto-West Germanic *pranganEvery word from Old Saxon *pranganEvery word from Middle Low German prangen