Where does “mörkki” come from?

mörkki (Finnish) comes from Swedish mörk, from Old Swedish myrker, from Old Norse myrkr, from Proto-Germanic merkuz, from Proto-Indo-European mergʷ- — dark, coloured; to flicker; to darken; to be dark.

Ancestry of “mörkki”, step by step

StepLanguageWordMeaning
1Swedishmörkdark
2Old Swedishmyrkerdark; hidden, obscured; sneaky, insidious
3Old Norsemyrkrdark, murky
4Proto-Germanicmerkuzdark
5Proto-Indo-Europeanmergʷ-dark, coloured; to flicker; to darken; to be dark
Every word from Proto-Indo-European mergʷ- →Every word from Proto-Germanic merkuz →Every word from Old Norse myrkr →