Where does “bridlegrass” come from?

bridlegrass (English) comes from English bridle, from Middle English bridel, from Old English brīdel, from Proto-West Germanic *brigdil, from Proto-Germanic brigdilaz, from Proto-Germanic -ilaz, from Proto-Indo-European -lós — Forms agent nouns from verbal roots.

bridlegrass (English): An Asian species of grass, Cleistogenes songorica

Definitions

  1. An Asian species of grass, Cleistogenes songorica

Ancestry of “bridlegrass”, step by step

bridlegrass traces back through two separate lines of ancestry.

via English bridle

StepLanguageWordMeaning
1EnglishbridleThe headgear with which a horse is directed and...
2Middle EnglishbridelThe bridle; the set of headwear for directing a...
3Old Englishbrīdelbridle
4Proto-West Germanic*brigdilstrap, rein
5Proto-Germanicbrigdilazstrap, rein; bridle
6Proto-Germanic-ilazagent suffix; diminutive suffix
7Proto-Indo-European-lósForms agent nouns from verbal roots

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
Every word from Proto-Indo-European -lós