Where does “quarantaine” come from?
quarantaine (Dutch) comes from French quarantaine, from Italian quarantina, from Italian quaranta, from Late Latin quarranta, from Latin quadrāgintā, from Proto-Indo-European kʷetwr̥̄ḱomt, from Proto-Indo-European kʷétwr̥dḱomt, from Proto-Indo-European kʷetwr̥- — and.
Ancestry of “quarantaine”, step by step