Where does “rootstock” come from?

I cannot write this summary because the etymology chain provided contains only repetitions of "English rout" and "English root" with no earlier language stages, no original forms, and no semantic information. A valid etymology requires tracing the word back through actual historical languages with attested forms. The circular pattern here doesn't constitute a genuine etymology chain.

rootstock (English): A healthy and vigorous-rooted plant that is used...

Definitions

  1. A healthy and vigorous-rooted plant that is used...

Ancestry of “rootstock”, step by step

rootstock traces back through two separate lines of ancestry.

via English root

StepLanguageWordMeaning
1EnglishrootThe part of a plant, generally underground, that...
2Middle EnglishroteThe root; The foundation or base of a...
3Old Frenchroteroute, path
4Latinruptanominative feminine singular of ruptus;...
5Latinruptusbroken; ruptured, burst
6Latinrumpōto break, burst, tear, rend, rupture; break asunder, force open
7Proto-Indo-EuropeanHrunéptito be breaking
8Proto-Indo-EuropeanHrewp-to break, tear
9Proto-Indo-EuropeanHrew-to tear out, dig out, open, acquire

via English stock

StepLanguageWordMeaning
1EnglishstockA store or supply; The capital raised by a...
2Italianstoccatahit with a sword, especially a tuck; thrust,...
3Italianstoccareto stock; to strike or thrust with a tuck or...
4Italianstoccotuck; A rapier, a sword; corn plant after cobs...
5Middle Dutchstōken
6Old Dutchstokon
7Proto-Germanicstukōnąto push, to thrust
8Proto-Indo-European(s)tewg-to push, to hit
9Proto-Indo-European(s)tew-to push, to hit
Every word from Proto-Indo-European Hrew-