Where does “osiemnastoletni” come from?

osiemnastoletni (Polish) comes from Polish osiemnaście, from Polish -y, from Old Polish -y, from Proto-Slavic jь, from Proto-Balto-Slavic iś, from Old Polish ić, from Proto-Slavic jьti, from Proto-Balto-Slavic eitei — to go.

osiemnastoletni (Polish): eighteen-year-old, eighteen-year-long

Definitions

  1. eighteen-year-old, eighteen-year-long

Ancestry of “osiemnastoletni”, step by step

osiemnastoletni traces back through two separate lines of ancestry.

via Polish osiemnaście

StepLanguageWordMeaning
1Polishosiemnaścieeighteen
2Polish-ynominative plural ending of some masculine nouns;...
3Old Polish-yforms adjectives
4Proto-Slavicthis; he
5Proto-Balto-Slavicthis
6Old Polishto go
7Proto-Slavicjьtito go
8Proto-Balto-Slaviceiteito go
9Proto-Indo-Europeanh₁éytito go, to be going
10Proto-Indo-Europeanh₁ey-to go

via Polish letni

StepLanguageWordMeaning
1Polishletnisummer, summery, estival
2Polishlatosummer
3Proto-Slaviclětosummer; year
4Proto-Indo-Europeanleh₁tóm
Every word from Proto-Indo-European h₁ey-Every word from Proto-Indo-European h₁éytiEvery word from Proto-Balto-Slavic eitei