Where does “sirkkelisaha” come from?

sirkkelisaha (Finnish) comes from Finnish sirkkeli, from Swedish cirkel, from Old Swedish cirkil, from Latin circulus, from Latin -ulus, from Proto-Italic -olos, from Proto-Italic -elos, from Proto-Indo-European -e-lós — Forms agent nouns from verbal roots.

Ancestry of “sirkkelisaha”, step by step

sirkkelisaha traces back through two separate lines of ancestry.

via Finnish sirkkeli

StepLanguageWordMeaning
1Finnishsirkkelicircular saw
2Swedishcirkelcircle
3Old Swedishcirkil
4Latincirculuscircle; An orbit; A ring, hoop
5Latin-ulusUsed to form a diminutive of a noun, indicating...
6Proto-Italic-olos
7Proto-Italic-elosForms desubstantival and deadjectival diminutive nouns
8Proto-Indo-European-e-lós
9Proto-Indo-European-lósForms agent nouns from verbal roots

via Finnish saha

StepLanguageWordMeaning
1Finnishsahasaw; sawmill; musical saw
2Old Swedishsaghsaw
3Old Norsesǫgsaw
4Proto-Germanicsagōsaw
5Proto-Indo-Europeansek-to cut, cut off, sever
Every word from Proto-Indo-European -lós