Where does “knotgrass” come from?

knotgrass (English) comes from English grass, from Middle English gras, from Old English græs, from Proto-West Germanic gras, from Proto-Germanic grasą, from Proto-Indo-European ǵʰreh₁- — to become green, grow; to grow; to green, to grow.

knotgrass (English): An annual plant, "Polygonum aviculare", found in...

Definitions

  1. An annual plant, "Polygonum aviculare", found in...

Ancestry of “knotgrass”, step by step

knotgrass traces back through two separate lines of ancestry.

via English grass

StepLanguageWordMeaning
1EnglishgrassAny plant of the family Poaceae, characterized by...
2Middle EnglishgrasA grass; Any plant; especially a herbaceous one;...
3Old Englishgræsgrass
4Proto-West Germanicgrasgrass
5Proto-Germanicgrasągrass
6Proto-Indo-Europeanǵʰreh₁-to become green, grow; to grow; to green, to grow

via English knot

StepLanguageWordMeaning
1EnglishknotA looping of a piece of string or of any other...
2Middle Englishknotteknot, tie; binding, method of attachment, link;...
3Old Englishcnottaknot
4Proto-Germanicknuttôa knot
5Proto-Indo-Europeangnod-to bind
Every word from Proto-Indo-European ǵʰreh₁-Every word from Proto-Germanic grasąEvery word from Proto-West Germanic gras