Where does “octogiens” come from?

octogiens (Latin) comes from Latin octōgintā, from Proto-Indo-European oḱtódḱomt, from Proto-Indo-European oḱto(w)-dḱomt — eight-ten.

Ancestry of “octogiens”, step by step

StepLanguageWordMeaning
1Latinoctōgintāeighty; 80
2Proto-Indo-Europeanoḱtódḱomteighty
3Proto-Indo-Europeanoḱto(w)-dḱomteight-ten
Every word from Proto-Indo-European oḱto(w)-dḱomt →Every word from Proto-Indo-European oḱtódḱomt →Every word from Latin octōgintā →