Where does “flashness” come from?

flashness (English) comes from English Ness, from Middle English nesse, from Old English næs, from Proto-Germanic nasją, from Proto-Indo-European néh₂s — nose.

flashness (English): Quality of being flash

Definitions

  1. Quality of being flash

Ancestry of “flashness”, step by step

flashness traces back through two separate lines of ancestry.

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

via English Flash

StepLanguageWordMeaning
1EnglishFlashA multimedia platform, most often used for adding animation and interactivity to webpages
2Middle Englishflasshen
Every word from Proto-Indo-European néh₂s