Where does “quadrāgēsimus” come from?
quadrāgēsimus (Latin) comes from Latin quadrāgintā, from Proto-Indo-European kʷetwr̥̄ḱomt, from Proto-Indo-European kʷétwr̥dḱomt, from Proto-Indo-European kʷetwr̥-, from Proto-Indo-European kʷetwóres, from Proto-Indo-European kʷe- — and.
Ancestry of “quadrāgēsimus”, step by step