Where does “pentavigesimal” come from?

pentavigesimal (English) comes from English vigesimal, from Latin vigesimus, from Latin vīgintī, from Latin quīnque, from Proto-Italic kʷenkʷe, from Proto-Indo-European pénkʷe — five.

pentavigesimal (English): quinary-vigesimal (based upon both the numbers five and twenty)

Definitions

  1. quinary-vigesimal (based upon both the numbers five and twenty)

Ancestry of “pentavigesimal”, step by step

pentavigesimal traces back through two separate lines of ancestry.

via English vigesimal

StepLanguageWordMeaning
1EnglishvigesimalOccurring in intervals of twenty; To the base...
2LatinvigesimusAlternative form of vicesimus; twentieth
3Latinvīgintītwenty
4Latinquīnquefive; 5
5Proto-Italickʷenkʷefive
6Proto-Indo-Europeanpénkʷefive

via English penta

StepLanguageWordMeaning
1Englishpenta
Every word from Proto-Indo-European pénkʷeEvery word from Proto-Italic kʷenkʷeEvery word from Latin quīnque
pentavigesimal — Etymology, Origin & Word History | Etymology Explorer