Where does “tvinning” come from?

tvinning (Swedish) comes from Swedish tvinna, from Old Norse tvinna, from Proto-Germanic twiznōną, from Proto-Indo-European dwisnós, from Proto-Indo-European dwóh₁ — two.

Ancestry of “tvinning”, step by step

StepLanguageWordMeaning
1Swedishtvinnasamman, or upp}} to twist, to twine (thread, a rope, a moustache or the like)
2Old Norsetvinna—
3Proto-Germanictwiznōnąto thread
4Proto-Indo-Europeandwisnósdouble
5Proto-Indo-Europeandwóh₁two
Every word from Proto-Indo-European dwóh₁ →Every word from Proto-Indo-European dwisnós →Every word from Proto-Germanic twiznōną →