Where does “rustlessness” come from?

rustlessness (English) comes from English rustless, from English rust, from Middle English rust, from Old English rūst, from Proto-Germanic rustaz, from Proto-Indo-European rudʰso-, from Proto-Indo-European h₁rewdʰ- — red.

rustlessness (English): The state or condition of being rustless; absence...

Definitions

  1. The state or condition of being rustless; absence...

Ancestry of “rustlessness”, step by step

rustlessness traces back through two separate lines of ancestry.

via English rustless

StepLanguageWordMeaning
1EnglishrustlessThat does not rust; stainless; Without rust;...
2EnglishrustThe deteriorated state of iron or steel as a...
3Middle Englishrustrust oxidisation of iron or steel
4Old Englishrūstrust
5Proto-Germanicrustazrust
6Proto-Indo-Europeanrudʰso-red
7Proto-Indo-Europeanh₁rewdʰ-red

via English Ness

StepLanguageWordMeaning
1EnglishNessAn Ulster princess and the mother of Conchobar mac Nessa and Findchoem in the Ulster Cycle of Irish mythology. Daughter of Eochaid Sálbuide. Also the mother of Cormac Cond Longas by incest with Conchobar mac Nessa
2Middle Englishnesse
3Old Englishnæsnot, not at all; not; first/third-person singular...
4Proto-Germanicnasjąfoothill; headland; cape
5Proto-Indo-Europeannéh₂snose
Every word from Proto-Indo-European h₁rewdʰ-