Where does “fountaingrass” come from?

fountaingrass (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.

fountaingrass (English): Any of the genus "Pennisetum" of grasses

Definitions

  1. Any of the genus "Pennisetum" of grasses

Ancestry of “fountaingrass”, step by step

fountaingrass 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 fountain

StepLanguageWordMeaning
1EnglishfountainA natural source of water; a spring; An...
2Old Frenchfontainefountain
3Latinfontānaspring, fountain, source
4Latinfontānusbearing a relation to the spring or source
5Latinfonsa spring, a fountain; fresh water, spring water;...
6Latinfontisgenitive singular of fōns
Every word from Proto-Indo-European ǵʰreh₁-Every word from Proto-Germanic grasąEvery word from Proto-West Germanic gras