Where does “bent grass” come from?

bent grass (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.

bent grass (English): Any of several grasses, of the genus "Agrostis",...

Definitions

  1. Any of several grasses, of the genus "Agrostis",...

Ancestry of “bent grass”, step by step

bent grass 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 bent

StepLanguageWordMeaning
1Englishbentsimple past tense and past participle of bend;...
2Middle Englishbent
3Old Englishbeonotcoarse grass, bent grass
Every word from Proto-Indo-European ǵʰreh₁-Every word from Proto-Germanic grasąEvery word from Proto-West Germanic gras