Where does “jänk” come from?

jänk (Swedish) comes from Swedish jänka, from Czech jamka, from Czech -ka, from Proto-Slavic -ъka, from Proto-Indo-European -kos — Creates deadjectival and desubstantival...

Ancestry of “jänk”, step by step

Step	Language	Word	Meaning
1	Swedish	jänka	make fit, make even
2	Czech	jamka	Diminutive of jáma; hole; socket
3	Czech	-ka	Appended to words to create a feminine version of...
4	Proto-Slavic	-ъka	Denominal, forms diminutives; Deadjectival,...
5	Proto-Indo-European	-kos	Creates deadjectival and desubstantival...

Every word from Proto-Indo-European -kos →