Where does “erter” come from?

erter (Norwegian Nynorsk) comes from Old Norse ertr, from Old Saxon erit, from Proto-Germanic arwīts — pea.

Ancestry of “erter”, step by step

StepLanguageWordMeaning
1Old Norseertrpeas
2Old SaxoneritAlternative form of eriwit
3Proto-Germanicarwītspea
Every word from Proto-Germanic arwīts →Every word from Old Saxon erit →Every word from Old Norse ertr →