Where does “cunst” come from?

cunst (Middle Dutch) comes from Old Dutch kunst, from Proto-Germanic kunstiz, from Proto-Germanic kunnaną, from Proto-Indo-European ǵneh₃- — to know.

Ancestry of “cunst”, step by step

Step	Language	Word	Meaning
1	Old Dutch	kunst	knowledge, know-how, skill
2	Proto-Germanic	kunstiz	knowledge, ability
3	Proto-Germanic	kunnaną	to know, to be familiar with, to recognise; to...
4	Proto-Indo-European	ǵneh₃-	to know

cunst — Etymology, Origin & Word History | Etymology Explorer