Where does “rodens” come from?

rodens (Latin) comes from Latin rōdō, from Proto-Indo-European Hreh₃d- — to scrape.

Ancestry of “rodens”, step by step

Step	Language	Word	Meaning
1	Latin	rōdō	—
2	Proto-Indo-European	Hreh₃d-	to scrape

rodens — Etymology, Origin & Word History | Etymology Explorer