Where does “guerillasota” come from?

guerillasota (Finnish) comes from German Guerilla, from Spanish guerrilla, from Spanish -illa, from Old Spanish -iella, from Latin -ella, from Latin -ellus, from Latin -ulus, from Proto-Italic -olos — Forms agent nouns from verbal roots.

Ancestry of “guerillasota”, step by step

guerillasota traces back through two separate lines of ancestry.

via German Guerilla

StepLanguageWordMeaning
1GermanGuerillaguerrilla; guerrilla warfare
2Spanishguerrillaguerrilla; guerrilla war
3Spanish-illaAdded to feminine nouns to denote a diminutive...
4Old Spanish-iellaA diminutive suffix
5Latin-ellainflection of -ellus: ## nominative/vocative...
6Latin-ellusAlternative form of -ulus; "forming masculine...
7Latin-ulusUsed to form a diminutive of a noun, indicating...
8Proto-Italic-olos
9Proto-Italic-elosForms desubstantival and deadjectival diminutive nouns
10Proto-Indo-European-e-lós
11Proto-Indo-European-lósForms agent nouns from verbal roots

via Finnish sota

StepLanguageWordMeaning
1Finnishsotawar; warfare; military, war-
2Proto-Finnicsotawar, conflict
3Proto-Uralicśoďawar
Every word from Proto-Indo-European -lós