Where does “bootstrap” come from?

I cannot write this etymology with confidence because the chain provided contains only repetitive cycling through "bootleg" and "leg" without establishing a clear etymological path or any oldest known form. A reliable etymology requires tracing back to an actual origin language with documented evidence, which this chain does not provide.

bootstrap (English): A loop sewn at the side or top rear of a boot to...

Definitions

  1. A loop sewn at the side or top rear of a boot to...

Ancestry of “bootstrap”, step by step

bootstrap traces back through two separate lines of ancestry.

via English boot

StepLanguageWordMeaning
1EnglishbootA heavy shoe that covers part of the leg; A blow...
2Frenchbotteboot; something resembling a boot; oppression
3Italianbottablow, hit, shock, knock, attack
4Italianbottare
5Frenchbouterto push; to remove flesh from the skin of an...
6Middle Frenchbouterto pull
7Old Frenchbouterto strike; to hit; to place; to put; to enter
8Frankishbautanto push, strike, beat; to hit, strike; to hit,...
9Proto-West Germanicbautanto beat
10Proto-Germanicbautanąto beat, push
11Proto-Indo-Europeanbʰewd-to hit, strike; to beat, push; to strike, push,...
12Proto-Indo-Europeanbʰew-to grow, swell; to swell, wax, grow; to blow; to...

via English strap

StepLanguageWordMeaning
1EnglishstrapA long, narrow, pliable strip of leather, cloth,...
2Englishstropeloop on a harness
3Middle Englishstrope
4Old Frenchestropestrap, loop on a harness
5Latinstroppusstrap, band, thong; garter; wreath
6Ancient Greekστρόφοςthong; rope; twisted band, cord
7Ancient Greekἄνθοςflower, blossom, bloom; froth, scum; bloom, peak
8Proto-Hellenicántʰosflower, blossom
9Proto-Indo-Europeanh₂éndʰosbloom
10Proto-Indo-European-osCreates action nouns or result nouns from verbs;...

Words derived from “bootstrap

Every word from Proto-Indo-European bʰew-