Where does “joukkoalgebra” come from?

joukkoalgebra (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.

joukkoalgebra (Finnish): set algebra

Definitions

set algebra

Ancestry of “joukkoalgebra”, step by step

joukkoalgebra traces back through two separate lines of ancestry.

via Finnish joukko

Step	Language	Word	Meaning
1	Finnish	joukko	group, cluster, band; crowd of people number of things or persons, especially a rather large and unorganized one
2	Proto-Finnic	joukko	group
3	Proto-Germanic	jaukiją	draught animal; team of oxen
4	Proto-Indo-European	yewg-	to join, to yoke, to tie together

via Finnish algebra

Step	Language	Word	Meaning
1	Finnish	algebra	algebra
2	New Latin	algebra	—
3	Arabic	جبر	to set; to restore; to force, to compel
4	Arabic	جَبَرَ	to set a broken bone; to treat kindly

Every word from Proto-Indo-European yewg- →Every word from Proto-Germanic jaukiją →Every word from Proto-Finnic joukko →