Where does “unsourceable” come from?

unsourceable (English) comes from English sourceable, from English source, from Middle English sours, from Old French sorse, from Latin surgere, from Latin surgo, from Latin subrigo, from Latin regō — to straighten, to right oneself; right; just.

unsourceable (English): that cannot be sourced

Definitions

  1. that cannot be sourced

Ancestry of “unsourceable”, step by step

unsourceable traces back through two separate lines of ancestry.

via English sourceable

StepLanguageWordMeaning
1EnglishsourceableThat can be sourced
2EnglishsourceThe person, place or thing from which something (information, goods, etc.) comes or is acquired
3Middle EnglishsoursA source or origin; that which something originates from
4Old Frenchsorserise, beginning, spring, source
5Latinsurgeresecond-person singular future passive indicative...
6LatinsurgoI rise, get up, I arise; I lift up, I straighten
7LatinsubrigoI lift up, I straighten
8Latinregōto rule, govern, direct
9Proto-Italicregō
10Proto-Indo-Europeanh₃réǵetito be straightening, to be setting upright
11Proto-Indo-Europeanh₃reǵ-to straighten, to right oneself; right; just

via English un

StepLanguageWordMeaning
1EnglishunOne
Every word from Proto-Indo-European h₃reǵ-Every word from Proto-Indo-European h₃réǵetiEvery word from Proto-Italic regō