Where does “siedemdziesięcioletni” come from?

siedemdziesięcioletni (Polish) comes from Polish letni, from Polish lato, from Proto-Slavic lěto, from Proto-Indo-European leh₁tóm.

siedemdziesięcioletni (Polish): seventy-year-old; seventy-year-long

Definitions

  1. seventy-year-old; seventy-year-long

Ancestry of “siedemdziesięcioletni”, step by step

siedemdziesięcioletni traces back through two separate lines of ancestry.

via Polish letni

StepLanguageWordMeaning
1Polishletnisummer, summery, estival
2Polishlatosummer
3Proto-Slaviclětosummer; year
4Proto-Indo-Europeanleh₁tóm—

via Polish siedemdziesiąt

StepLanguageWordMeaning
1Polishsiedemdziesiątseventy
2Old Polishsiedmdziesiątseventy
3Proto-Slavic*sedmь desęti—
Every word from Proto-Indo-European leh₁tóm →Every word from Proto-Slavic lěto →Every word from Polish lato →