Where does “mainstreamness” come from?

mainstreamness (English) comes from English mainstream, from English stream, from Middle English streem, from Middle English strem, from Old English strēam, from Proto-West Germanic straum, from Proto-Germanic straumaz, from Proto-Indo-European srowmos — to flow; to guard; to bind, to tie together.

mainstreamness (English): Quality of being mainstream

Definitions

  1. Quality of being mainstream

Ancestry of “mainstreamness”, step by step

mainstreamness traces back through two separate lines of ancestry.

via English mainstream

StepLanguageWordMeaning
1EnglishmainstreamUsed or accepted broadly rather than by small...
2EnglishstreamA small river; a large creek; a body of moving...
3Middle EnglishstreemAlternative form of strem
4Middle EnglishstremA waterbody; a region of the world containing...
5Old Englishstrēamcurrent; stream
6Proto-West Germanicstraumstream
7Proto-Germanicstraumazstream, current, river
8Proto-Indo-Europeansrowmosriver
9Proto-Indo-Europeansrew-to flow, stream
10Proto-Indo-Europeanser-to flow; to guard; to bind, to tie together

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 ser-Every word from Proto-Indo-European srew-Every word from Proto-Indo-European srowmos