Where does “ljodbok” come from?

ljodbok (Norwegian Nynorsk) comes from Norwegian Nynorsk ljod, from Old Norse hljóð, from Proto-Germanic hleuþą, from Proto-Indo-European ḱlew-to-, from Proto-Indo-European ḱlew-, from Proto-Indo-European ḱel- — to cover; to incline.

Ancestry of “ljodbok”, step by step

ljodbok traces back through two separate lines of ancestry.

via Norwegian Nynorsk ljod

StepLanguageWordMeaning
1Norwegian Nynorskljodsound
2Old Norsehljóðsilence, hearing; a sound, cry; a musical sound,...
3Proto-Germanichleuþąlistening, hearing; sound
4Proto-Indo-Europeanḱlew-to-—
5Proto-Indo-Europeanḱlew-to hear
6Proto-Indo-Europeanḱel-to cover; to incline

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
Every word from Proto-Indo-European ḱel- →Every word from Proto-Indo-European ḱlew- →Every word from Proto-Indo-European ḱlew-to- →
ljodbok — Etymology, Origin & Word History | Etymology Explorer