Where does “gres” come from?

gres (Old Frisian) comes from Proto-West Germanic gras, from Proto-Germanic grasą, from Proto-Indo-European ǵʰreh₁- — to become green, grow; to grow; to green, to grow.

Ancestry of “gres”, step by step

StepLanguageWordMeaning
1Proto-West Germanicgrasgrass
2Proto-Germanicgrasągrass
3Proto-Indo-Europeanǵʰreh₁-to become green, grow; to grow; to green, to grow
Every word from Proto-Indo-European ǵʰreh₁- →Every word from Proto-Germanic grasą →Every word from Proto-West Germanic gras →