Where does “rue” come from?

rue (Middle English) comes from Anglo-Norman ruwe, from Old French rue, from Latin rūga, from Proto-Indo-European krewp-, from Proto-Indo-European krew- — to fall, collapse; scab; to fall, break, bruise.

rue (Middle English): A kind of plant belonging to the genus "Ruta";...

Definitions

A kind of plant belonging to the genus "Ruta";...

Ancestry of “rue”, step by step

rue traces back through two separate lines of ancestry.

via Anglo-Norman ruwe

Step	Language	Word	Meaning
1	Anglo-Norman	ruwe	Alternative form of rue
2	Old French	rue	rue (plant)
3	Latin	rūga	a crease in the face, wrinkle
4	Proto-Indo-European	krewp-	scab, crust; to become encrusted
5	Proto-Indo-European	krew-	to fall, collapse; scab; to fall, break, bruise

via Anglo-Norman rue

Step	Language	Word	Meaning
1	Anglo-Norman	rue	—
2	Latin	rūta	rue bitter herb
3	Ancient Greek	ῥυτή	rue

Words derived from “rue”

Every word from Proto-Indo-European krew- →Every word from Proto-Indo-European krewp- →Every word from Latin rūga →