Where does “grass rooter” come from?

grass rooter (English) comes from English ER, from Turkish er, from Ottoman Turkish ایر, from Old Anatolian Turkish ایر, from Proto-Turkic ēder — saddle.

grass rooter (English): One who belongs to, or supports, the grass roots of an industry, organization, etc

Definitions

  1. One who belongs to, or supports, the grass roots of an industry, organization, etc

Ancestry of “grass rooter”, step by step

grass rooter traces back through two separate lines of ancestry.

via English ER

StepLanguageWordMeaning
1EnglishERThe statistic "Earned Run"; Initialism of...
2Turkisherearly; brave; man, male
3Ottoman Turkishایرsaddle, a seat for a rider placed on the back of a horse or other animal
4Old Anatolian Turkishایرearly, at a time in advance of the usual or expected event
5Proto-Turkicēdersaddle

via English grass roots

StepLanguageWordMeaning
1Englishgrass rootsPeople and society at the local (most basic) level rather than at the national centre of political activity
Every word from Proto-Turkic ēderEvery word from Old Anatolian Turkish ایرEvery word from Ottoman Turkish ایر