Where does “ilmastaminen” come from?

ilmastaminen (Finnish) comes from Finnish ilmastaa, from Finnish Ilma, from Finnish -ri, from Finnish -ra, from Finnish -i, from Proto-Uralic -j — oblique plural.

Ancestry of “ilmastaminen”, step by step

Step	Language	Word	Meaning
1	Finnish	ilmastaa	to aerate
2	Finnish	Ilma	air
3	Finnish	-ri	Used to create names of occupations from nouns or...
4	Finnish	-ra	Forms nouns or adjectives, mostly from nominal...
5	Finnish	-i	A nominal suffix used in eg. ukko → ukki; Used...
6	Proto-Uralic	-j	oblique plural

Every word from Proto-Uralic -j →Every word from Finnish -i →Every word from Finnish -ri →