Where does “cinquaenta” come from?

cinquaenta (Old Portuguese) comes from Latin quīnquāgintā, from Proto-Indo-European penkʷēḱomt, from Proto-Indo-European *pénkʷedḱomt.

Ancestry of “cinquaenta”, step by step

StepLanguageWordMeaning
1Latinquīnquāgintāfifty; 50
2Proto-Indo-Europeanpenkʷēḱomt—
3Proto-Indo-European*pénkʷedḱomt—

Words derived from “cinquaenta”

Every word from Proto-Indo-European *pénkʷedḱomt →Every word from Proto-Indo-European penkʷēḱomt →Every word from Latin quīnquāgintā →