Where does “switchblade” come from?

switchblade (English) comes from English blade, from Middle English blade, from Old English blæd, from Proto-West Germanic blad, from Proto-Germanic bladą, from Proto-Indo-European bʰlh̥₃oto, from Proto-Indo-European bʰleh₃-, from Proto-Indo-European bʰel-.

switchblade (English): A folding knife with a blade which opens...

Definitions

  1. A folding knife with a blade which opens...

Ancestry of “switchblade”, step by step

switchblade traces back through two separate lines of ancestry.

via English blade

StepLanguageWordMeaning
1EnglishbladeThe sharp cutting edge of a knife, chisel, or...
2Middle EnglishbladeA leaf or blade; a piece foliage in general; A...
3Old Englishblæda leaf; the broad, flat blade of a utensil;...
4Proto-West Germanicbladleaf; sheet; blade
5Proto-Germanicbladąleaf; sheet; blade
6Proto-Indo-Europeanbʰlh̥₃oto
7Proto-Indo-Europeanbʰleh₃-bloom, flower
8Proto-Indo-Europeanbʰel-to sound; to speak, roar, bark; shiny, white; to...
9Proto-Indo-Europeanbʰōl-

via English switch

StepLanguageWordMeaning
1EnglishswitchA device to turn electric current on and off or...
2Middle Dutchswijchtwig
Every word from Proto-Indo-European bʰōl-