Where does “joukko-osasto” come from?

joukko-osasto (Finnish) comes from Finnish osasto, from Finnish -sto, from Finnish -ta, from Proto-Finnic -ta, from Proto-Uralic -tä — from.

joukko-osasto (Finnish): a military unit (e.g. troop, corps, unit), especially (e.g. in the Finnish Defence Forces) one which reports directly to the General Staff, a military branch or a military province

Definitions

a military unit (e.g. troop, corps, unit), especially (e.g. in the Finnish Defence Forces) one which reports directly to the General Staff, a military branch or a military province

Ancestry of “joukko-osasto”, step by step

joukko-osasto traces back through two separate lines of ancestry.

via Finnish osasto

Step	Language	Word	Meaning
1	Finnish	osasto	department; compartment; section
2	Finnish	-sto	Forms collective nouns from nouns indicating...
3	Finnish	-ta	A suffix for the partitive singular case; Forms...
4	Proto-Finnic	-ta	Partitive ending
5	Proto-Uralic	-tä	from

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

Every word from Proto-Uralic -tä →Every word from Finnish -ta →Every word from Finnish -sto →