Where does “rondger” come from?

rondger (Picard) comes from Old French rongier, from Old French rungier, from Latin rūmigāre.

rondger (Picard): to gnaw

Definitions

Step	Language	Word	Meaning
1	Old French	rongier	—
2	Old French	rungier	—
3	Latin	rūmigāre	—

rondger — Etymology, Origin & Word History | Etymology Explorer