Where does “tredecennium” come from?

tredecennium (Latin) comes from Latin tredecim, from Latin decem, from Latin -nus, from Proto-Italic -nos, from Proto-Indo-European -nós — Creates verbal adjectives from roots.

tredecennium (Latin): a thirteen-year period

Definitions

  1. a thirteen-year period

Ancestry of “tredecennium”, step by step

tredecennium traces back through two separate lines of ancestry.

via Latin tredecim

StepLanguageWordMeaning
1Latintredecimthirteen; 13
2Latindecemten; 10
3Latin-nus-an
4Proto-Italic-nosCreates verbal adjectives from verb stems
5Proto-Indo-European-nósCreates verbal adjectives from roots

via Latin annus

StepLanguageWordMeaning
1Latinannusyear; time; season
2Proto-Italicatnosyear
3Proto-Indo-Europeanh₂et-no-—
4Proto-Indo-Europeanh₂et-grass
Every word from Proto-Indo-European -nós →Every word from Latin -nus →Every word from Latin decem →