Where does “above ground” come from?

above ground (English) comes from English above, from Middle English aboven, from Old English ābufan, from Old English bufan, from Proto-West Germanic *biobanā, from Proto-West Germanic *obanā, from Proto-Germanic ubanē, from Proto-Germanic upp.

Ancestry of “above ground”, step by step

above ground traces back through two separate lines of ancestry.

via English above

StepLanguageWordMeaning
1EnglishabovePhysically over; on top of; worn on top of, said...
2Middle Englishabovenabove
3Old Englishābufanabove
4Old Englishbufanabove
5Proto-West Germanic*biobanā
6Proto-West Germanic*obanāfrom above
7Proto-Germanicubanēfrom above
8Proto-Germanicuppup, upwards
9Proto-Germanicubunder
10Proto-Indo-Europeanupóunder, below
11Proto-Indo-Europeanh₃ewp-

via English ground

StepLanguageWordMeaning
1EnglishgroundThe surface of the Earth, as opposed to the sky...
2Middle Englishgroundground; Earth
3Old Englishgrundground; bottom, foundation; abyss, depths
4Proto-Germanicgrunduzground, foundation
5Proto-Indo-Europeangʰrem-to be angry; to sound, bellow, growl, roar, be...
6Proto-Indo-Europeangʰer-to rub; to stroke; to grind
Every word from Proto-Indo-European h₃ewp-Every word from Proto-Indo-European upóEvery word from Proto-Germanic ub