Where does “cérnák” come from?

cérnák (Hungarian) comes from Hungarian cérna, from German zwirn, from Middle High German zwirn, from Old High German zwirn, from Proto-West Germanic twiʀn, from Proto-Germanic twiznaz, from Proto-Indo-European dwisnós, from Proto-Indo-European dwóh₁ — two.

Ancestry of “cérnák”, step by step

StepLanguageWordMeaning
1Hungariancérnathread
2Germanzwirnsingular imperative of zwirnen; first-person...
3Middle High Germanzwirn—
4Old High Germanzwirn—
5Proto-West Germanictwiʀntwine, double thread
6Proto-Germanictwiznazthread, twine
7Proto-Indo-Europeandwisnósdouble
8Proto-Indo-Europeandwóh₁two
Every word from Proto-Indo-European dwóh₁ →Every word from Proto-Indo-European dwisnós →Every word from Proto-Germanic twiznaz →