Where does “aktiivistuminen” come from?

aktiivistuminen (Finnish) comes from Finnish aktiivistua, from Finnish aktiivistaa, from Finnish aktiivinen, from Finnish aktiivi, from Latin āctīvus, from Ancient Greek ἐνεργητικός, from Ancient Greek ἐνεργέω, from Ancient Greek ἐνεργός.

Ancestry of “aktiivistuminen”, step by step

Step	Language	Word	Meaning
1	Finnish	aktiivistua	to become more active
2	Finnish	aktiivistaa	To make more active
3	Finnish	aktiivinen	active
4	Finnish	aktiivi	activist; active voice; Alternative form of...
5	Latin	āctīvus	active
6	Ancient Greek	ἐνεργητικός	Able to act on; acting on; Active; In the active...
7	Ancient Greek	ἐνεργέω	to be in action or activity, to operate; to...
8	Ancient Greek	ἐνεργός	at work, active
9	Ancient Greek	ἐν-	in, within; on
10	Ancient Greek	ἐν	in, on, at; among; in, at, or during the time of
11	Ancient Greek	δέρμα	skin, hide
12	Ancient Greek	γλυφή	carving, carved work; hole cut
13	Ancient Greek	-ῐ́ᾱ	{{l\|en\|-ia}}; "suffix forming abstract feminine...
14	Proto-Indo-European	-íh₂	—

Every word from Proto-Indo-European -íh₂ →Every word from Ancient Greek -ῐ́ᾱ →Every word from Ancient Greek ἐν- →