Where does “paginare” come from?

paginare (Medieval Latin) comes from Latin pāgina, from Proto-Indo-European peh₂ǵ- — to attach.

Ancestry of “paginare”, step by step

Step	Language	Word	Meaning
1	Latin	pāgina	—
2	Proto-Indo-European	peh₂ǵ-	to attach

paginare — Etymology, Origin & Word History | Etymology Explorer