Where does “hupiakku” come from?

hupiakku (Finnish) comes from Finnish akku, from Finnish akkumulaattori, from Latin accumulator, from Latin accumulō, from Latin ad-, from Latin īn-, from Latin în, from Latin en — in.

Ancestry of “hupiakku”, step by step

hupiakku traces back through two separate lines of ancestry.

via Finnish akku

StepLanguageWordMeaning
1Finnishakkubattery; accumulator; batteries
2Finnishakkumulaattoriaccumulator
3Latinaccumulatorsecond-person singular future passive imperative...
4Latinaccumulōto add to a heap, heap or pile up, accumulate, load, amass
5Latinad-to; usually prefixed to verbs, in which cases it...
6Latinīn-un-, non-, not
7Latinînin, at, on, upon, from (space)
8Latinenlookǃ beholdǃ; reallyǃ?; come onǃ
9Proto-Italicenin
10Proto-Indo-Europeanh₁énin

via Finnish hupi

StepLanguageWordMeaning
1Finnishhupifun
2Finnishhupaquickly diminishing; funny
3Proto-Finnichupalean, thin
4Proto-Uralicčupa
Every word from Proto-Indo-European h₁énEvery word from Latin īn-Every word from Latin ad-
hupiakku — Etymology, Origin & Word History | Etymology Explorer