Where does “platness” come from?

platness (English) comes from English plat, from English platform, from Middle French plateforme, from Ancient Greek πλατύς, from Proto-Indo-European pléth₂us, from Proto-Indo-European pleth₂- — flat.

platness (English): flatness

Definitions

  1. flatness

Ancestry of “platness”, step by step

platness traces back through two separate lines of ancestry.

via English plat

StepLanguageWordMeaning
1EnglishplatA plot of land; a lot; A map showing the...
2EnglishplatformA raised stage from which speeches are made and...
3Middle Frenchplateformea flat form
4Ancient Greekπλατύςwide, broad; flat, level; broad-shouldered
5Proto-Indo-Europeanpléth₂usflat, broad
6Proto-Indo-Europeanpleth₂-flat

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 pleth₂-Every word from Proto-Indo-European pléth₂usEvery word from Ancient Greek πλατύς