Where does “pinnacle” come from?

Pinnacle comes from Old French pinacle, derived from Late Latin pinnaculum, which stems from Latin pinna meaning wing or feather, ultimately from Latin penna with the same sense.

pinnacle (English): The highest point; A tall, sharp and craggy rock...

Definitions

  1. The highest point; A tall, sharp and craggy rock...

Ancestry of “pinnacle”, step by step

StepLanguageWordMeaning
1Old Frenchpinnacle
2Latinpinnāculuma peak, pinnacle
3LatinPinnaA city of the Vestini situated on the eastern slope of the Apennines, now the town of Penne
4Latinpennawing; feather, especially a flight-feather;...
5Proto-Italicpetnāfeather; wing
6Proto-Indo-Europeanpéth₂r̥wing; feather
7Proto-Indo-Europeanpeth₂-to spread out; to fly
Every word from Proto-Indo-European peth₂-
pinnacle — Etymology, Origin & Word History | Etymology Explorer