Where does “harottaminen” come from?

harottaminen (Finnish) comes from Finnish harottaa, from Finnish hara, from Finnish -lä, from Finnish -as, from Proto-Finnic -s, from Proto-Finno-Ugric -s.

Ancestry of “harottaminen”, step by step

Step	Language	Word	Meaning
1	Finnish	harottaa	to protrude, jut out, splay in different directions
2	Finnish	hara	harrow
3	Finnish	-lä	Front vowel variant of -la
4	Finnish	-as	Forms some adjectives; Forms some nouns
5	Proto-Finnic	-s	Forms nouns
6	Proto-Finno-Ugric	-s	—

Every word from Proto-Finno-Ugric -s →Every word from Finnish -lä →Every word from Finnish -as →