Where does “rust-free” come from?

rust-free (English) comes from English Free, from English faller, from English -er, from Middle English -er, from Old French -er, from Latin -āre, from Proto-Italic -āō, from Proto-Indo-European -eh₂yéti — he, she.

rust-free (English): Of an object, lacking rust entirely or not susceptible to significant structural corrosion

Definitions

  1. Of an object, lacking rust entirely or not susceptible to significant structural corrosion

Ancestry of “rust-free”, step by step

rust-free traces back through two separate lines of ancestry.

via English Free

StepLanguageWordMeaning
1EnglishFreeUnconstrained
2EnglishfallerOne who falls; A fruit that falls from the tree,...
3English-erA person or thing that does an action indicated...
4Middle English-eragentive suffix; agent noun suffix
5Old French-erAlternative form of -ier, verbal suffix;...
6Latin-ārefirst conjugation
7Proto-Italic-āōForms primarily denominative verbs
8Proto-Indo-European-eh₂yétiCreates iterative/ frequentative/ intensive...
9Proto-Indo-European-yétiCreates intransitive, often deponent,...
10Proto-Indo-Europeanyé-
11Chichewaiyehe, she

via English rust

StepLanguageWordMeaning
1EnglishrustThe deteriorated state of iron or steel as a...
2Middle Englishrustrust oxidisation of iron or steel
3Old Englishrūstrust
4Proto-Germanicrustazrust
5Proto-Indo-Europeanrudʰso-red
6Proto-Indo-Europeanh₁rewdʰ-red
Every word from Chichewa iye
rust-free — Etymology, Origin & Word History | Etymology Explorer