Where does “barweed” come from?

barweed (English) comes from English Bar, from German bär, from Middle High German bër, from Old High German beri, from Proto-West Germanic baʀi, from Proto-Germanic bazją, from Proto-Indo-European bʰeh₂-, from Proto-Indo-European bʰeh₂-s-ri-.

Ancestry of “barweed”, step by step

barweed 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 weed

StepLanguageWordMeaning
1EnglishweedAny plant regarded as unwanted at the place...
2Middle Englishweed
3Old Englishwēodweed
4Proto-West Germanic*weudweed (unwanted plant)
Every word from Proto-Indo-European bʰeh₂-s-ri-Every word from Proto-Indo-European bʰeh₂-Every word from Proto-Germanic bazją