Where does “knockproof” come from?

knockproof (English) comes from English proof, from Middle English proof, from Old French prove, from Latin proba, from Latin probāre, from Latin probō, from Latin Probus, from Proto-Indo-European pro-bhwo- — passed , crossed.

knockproof (English): Preventing or reducing the occurrence of engine...

Definitions

  1. Preventing or reducing the occurrence of engine...

Ancestry of “knockproof”, step by step

knockproof traces back through two separate lines of ancestry.

via English proof

StepLanguageWordMeaning
1EnglishproofAn effort, process, or operation designed to...
2Middle Englishproof
3Old Frenchprove
4Latinprobatest, trial; proof, evidence
5Latinprobāre
6Latinprobōto approve, permit, commend
7LatinProbusgood, serviceable, excellent, superior, able
8Proto-Indo-Europeanpro-bhwo-being in front, prominent
9Proto-Indo-Europeanpro-toward, forward
10Proto-Indo-Europeanpor-to give birth; forward, through; going, passage
11Proto-Indo-Europeanper-before, in front; first; to go through
12Proto-Indo-Europeanpr̥tóspassed , crossed

via English knock

StepLanguageWordMeaning
1EnglishknockAn abrupt rapping sound, as from an impact of a...
2Middle EnglishknokkenTo pound; to beat down
3Old Englishcnocianto knock; to knock on something; to hit, strike
4Proto-GermanicknukōnąTo pound on; beat on; knock
5Proto-Indo-Europeangnew-a bundle; knot; knot, bundle
6Proto-Indo-Europeangen-to squeeze, pinch, kink, ball up, concentrate; to...
Every word from Proto-Indo-European pr̥tósEvery word from Proto-Indo-European per-Every word from Proto-Indo-European por-