Where does “rebar” come from?

I need to work through this chain carefully, but I notice there's a problem: the chain provided doesn't actually support the word "rebar" clearly. The chain shows: English bar ← French barre ← Ancient Greek βαρύς, plus separate Proto-Indo-European roots (wert-, wer-). However, "rebar" is a modern compound of "reinforced bar," and the chain as given doesn't trace this compound word or explain how these elements combine to form it. Additionally, the chain lists "Latin re-" twice and includes PIE roots (wert-, wer-) that don't connect logically to the preceding etymons (Ancient Greek βαρύς means "heavy," not related to the PIE *wer- root). **I cannot write an accurate one-sentence summary** because: 1. The chain doesn't actually support "rebar" as a traceable etymological

rebar (English): A steel reinforcing bar in a reinforced concrete...

Definitions

  1. A steel reinforcing bar in a reinforced concrete...

Ancestry of “rebar”, step by step

rebar traces back through two separate lines of ancestry.

via English Bar

StepLanguageWordMeaning
1EnglishBarA solid, more or less rigid object of metal or wood with a uniform cross-section smaller than its length
2Germanbär
3Middle High Germanbërbear
4Old High GermanberiA berry
5Proto-West Germanicbaʀiberry
6Proto-Germanicbazjąberry
7Proto-Indo-Europeanbʰeh₂-to shine, glow light; to speak, say
8Proto-Indo-Europeanbʰeh₂-s-ri-

via English reinforcing

StepLanguageWordMeaning
1EnglishreinforcingUsed to reinforce; Something that reinforces;...
Every word from Proto-Indo-European bʰeh₂-s-ri-
rebar — Etymology, Origin & Word History | Etymology Explorer