Where does “fälla ned” come from?

fälla ned (Swedish) comes from Swedish fälla, from Old Swedish fælla, from Old Norse fella, from Proto-Germanic fallijaną, from Proto-Germanic fallaną, from Proto-Indo-European pōl-, from Slovincian pól, from Proto-Slavic polъ — to split off, separate; to chop, to separate.

Ancestry of “fälla ned”, step by step

fälla ned traces back through two separate lines of ancestry.

via Swedish fälla

StepLanguageWordMeaning
1Swedishfällatrap; to fell; to make something fall; to fell;...
2Old Swedishfællato fell, cause to fall; to neglect; to prevent
3Old Norsefella
4Proto-Germanicfallijanąto cause to fall, to fell
5Proto-Germanicfallanąto fall
6Proto-Indo-Europeanpōl-
7Slovincianpólhalf
8Proto-Slavicpolъside, flank; half; member of a pair of options →...
9Proto-Indo-European(s)pelH-to split off, separate; to chop, to separate

via Swedish ned

StepLanguageWordMeaning
1Swedishneddown
2Old Norseniðrdown; kinsman, relative; son
3Proto-Germanicniþerdown, downwards
4Proto-Indo-Europeanniter
Every word from Proto-Indo-European (s)pelH-Every word from Proto-Slavic polъEvery word from Slovincian pól