Where does “skurning” come from?

skurning (Swedish) comes from Swedish skura, from Old French escurer, from Medieval Latin scuro, from Latin cūrō, from Latin cūra, from Proto-Indo-European kʷeys-, from Proto-Indo-European kʷey- — to pay; to avenge.

Ancestry of “skurning”, step by step

Step	Language	Word	Meaning
1	Swedish	skura	to scrub
2	Old French	escurer	—
3	Medieval Latin	scuro	—
4	Latin	cūrō	to arrange, see to, attend to, take care of, look after, ensure, tend to
5	Latin	cūra	care, concern, thought
6	Proto-Indo-European	kʷeys-	to see; to heed
7	Proto-Indo-European	kʷey-	to pay; to avenge

Every word from Proto-Indo-European kʷey- →Every word from Proto-Indo-European kʷeys- →Every word from Latin cūra →