Where does “huoltoapu” come from?

huoltoapu (Finnish) comes from Finnish huolto, from Finnish huoltaa, from Finnish huoli, from Proto-Finnic hooli, from Swedish hål, from Old Swedish hul, from Old Norse hól, from Proto-Germanic hulą — to cover; to incline.

Ancestry of “huoltoapu”, step by step

huoltoapu traces back through two separate lines of ancestry.

via Finnish huolto

StepLanguageWordMeaning
1Finnishhuoltoservice, maintenance, upkeep, care; logistics
2FinnishhuoltaaTo maintain, support, upkeep; To service;...
3Finnishhuoliworry, concern; Third-person singular indicative...
4Proto-Finnichooliworry, concern
5Swedishhåla hole; a hole, an opening in something solid; a...
6Old Swedishhul
7Old Norsehóla hole
8Proto-Germanichuląa hollow; depression; hole
9Proto-Germanichulazhollow
10Proto-Indo-Europeanḱel-to cover; to incline

via Finnish apu

StepLanguageWordMeaning
1Finnishapuhelp; assistance; helping hand
2Proto-FinnicapuAlternative form of *api
Every word from Proto-Indo-European ḱel-