Where does “tyhjä joukko” come from?

tyhjä joukko (Finnish) comes from Finnish tyhjä, from Proto-Finnic tühjä, from Proto-Balto-Slavic tuskjas, from Proto-Indo-European tews-, from Proto-Indo-European tu- — to swell; bird-cry, shriek.

tyhjä joukko (Finnish): empty set

Definitions

  1. empty set

Ancestry of “tyhjä joukko”, step by step

tyhjä joukko traces back through two separate lines of ancestry.

via Finnish tyhjä

StepLanguageWordMeaning
1Finnishtyhjäempty; blank; void
2Proto-Finnictühjäempty
3Proto-Balto-Slavictuskjasempty
4Proto-Indo-Europeantews-to be empty; to drain; to be happy
5Proto-Indo-Europeantu-to swell; bird-cry, shriek

via Finnish joukko

StepLanguageWordMeaning
1Finnishjoukkogroup, cluster, band; crowd of people number of things or persons, especially a rather large and unorganized one
2Proto-Finnicjoukkogroup
3Proto-Germanicjaukijądraught animal; team of oxen
4Proto-Indo-Europeanyewg-to join, to yoke, to tie together
Every word from Proto-Indo-European tu- →Every word from Proto-Indo-European tews- →Every word from Proto-Balto-Slavic tuskjas →