Where does “vísubók” come from?

vísubók (Norwegian Nynorsk) comes from Norwegian Nynorsk bok, from Old Norse bók, from Proto-Germanic bōks, from Proto-Indo-European bʰeh₂ǵos — beech.

Ancestry of “vísubók”, step by step

vísubók traces back through two separate lines of ancestry.

via Norwegian Nynorsk bok

StepLanguageWordMeaning
1Norwegian Nynorskboka book
2Old Norsebókbeech; textile fabric with figures woven in it;...
3Proto-Germanicbōksletter, written message, inscriptions carved into...
4Proto-Indo-Europeanbʰeh₂ǵosbeech

via Norwegian Nynorsk visa

StepLanguageWordMeaning
1Norwegian Nynorskvisato show, point out; to send away; to demonstrate,...
2Old Norsevísato show, point out, indicate; verse, strophe,...
3Proto-Germanicwīsōway, method, etc
4Proto-Indo-Europeanweyd-to see
Every word from Proto-Indo-European bʰeh₂ǵosEvery word from Proto-Germanic bōksEvery word from Old Norse bók