joukkokirje (Finnish) comes from Finnish joukko, from Proto-Finnic joukko, from Proto-Germanic jaukiją, from Proto-Indo-European yewg- — to join, to yoke, to tie together.
joukkokirje (Finnish): circular, bulk letter, bulk mail
Definitions
circular, bulk letter, bulk mail
Ancestry of “joukkokirje”, step by step
joukkokirje traces back through two separate lines of ancestry.