Where does “keypoint” come from?

keypoint (English) comes from English point, from Middle English point, from Old French point, from Latin pūnctum, from Latin punctus, from Latin -tus, from Proto-Italic -tus, from Proto-Indo-European -tus — Derives action nouns from verb roots.

keypoint (English): Part of a valley where the lower and flatter...

Definitions

  1. Part of a valley where the lower and flatter...

Ancestry of “keypoint”, step by step

keypoint traces back through two separate lines of ancestry.

via English point

StepLanguageWordMeaning
1EnglishpointA discrete division of something; A sharp...
2Middle Englishpoint
3Old Frenchpointa sting; a prick; moment; time; dot
4Latinpūnctumpoint
5Latinpunctuspricked, punctured, pierced, having been pricked;...
6Latin-tusForms the past participle of verbs; Forms...
7Proto-Italic-tus
8Proto-Indo-European-tusDerives action nouns from verb roots

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
Every word from Proto-Indo-European -tusEvery word from Latin -tusEvery word from Latin punctus