Where does “huitantième” come from?
huitantième (French) comes from French huitante, from Old French oitante, from Latin octāgintā, from Proto-Indo-European oktōḱomt, from Proto-Indo-European oḱto(w)-dḱomt — eight-ten.
huitantième (French): eightieth
Ancestry of “huitantième”, step by step