Where does “ruggen” come from?

ruggen (Middle English) comes from Middle English rokken, from Old English roccian, from Proto-West Germanic *rukkōn, from Proto-Germanic rukkōną, from Proto-Indo-European Hruknéh₂-, from Proto-Indo-European h₃rewk-, from Proto-Indo-European h₃er- — to move, to stir; to rise, to spring; to quarrel,...

Ancestry of “ruggen”, step by step

StepLanguageWordMeaning
1Middle Englishrokkento rock
2Old Englishroccianto rock
3Proto-West Germanic*rukkōn
4Proto-Germanicrukkōnąto move, move back and forth, rock
5Proto-Indo-EuropeanHruknéh₂-
6Proto-Indo-Europeanh₃rewk-to dig; to till
7Proto-Indo-Europeanh₃er-to move, to stir; to rise, to spring; to quarrel,...
Every word from Proto-Indo-European h₃er-Every word from Proto-Indo-European h₃rewk-Every word from Proto-Indo-European Hruknéh₂-