Where does “turnkey” come from?

Turnkey comes from English turn and English key, with turn deriving from Latin tornare and ultimately Proto-Indo-European terh₁- meaning to turn or twist.

turnkey (English): Ready to use without further assembly or test;...

Definitions

  1. Ready to use without further assembly or test;...

Ancestry of “turnkey”, step by step

turnkey traces back through two separate lines of ancestry.

via English turn

StepLanguageWordMeaning
1Englishturn"to make a non-linear physical movement."; "To...
2Middle Englishturnento turn
3Old Frenchtornerto turn; to return; to go back
4Latintornōto turn
5LatintornusA turner's wheel, lathe; A potter's wheel
6Ancient GreekτόρνοςA tool similar to a pair of compasses used to...
7Proto-Indo-Europeantorh₂no-
8Proto-Indo-Europeanterh₁-to rub, turn; to drill, pierce

via English key

StepLanguageWordMeaning
1EnglishkeyAn object designed to open and close a lock; An...
2EnglishcayA small, low island largely made of sand or coral
3SpanishCayokey island
4Taínocayosmall island

Words derived from “turnkey

Every word from Proto-Indo-European terh₁-
turnkey — Etymology, Origin & Word History | Etymology Explorer