Where does “piiloilkeä” come from?

piiloilkeä (Finnish) comes from Finnish ilkeä, from Proto-Finnic ilkeda, from Proto-Germanic ilhilaz, from Proto-Indo-European h₁elḱ-.

Ancestry of “piiloilkeä”, step by step

piiloilkeä traces back through two separate lines of ancestry.

via Finnish ilkeä

StepLanguageWordMeaning
1Finnishilkeäbad, mean, wicked; mischievous, troublesome,...
2Proto-Finnicilkedabad, mean; disgusting
3Proto-Germanicilhilazbad, evil
4Proto-Indo-Europeanh₁elḱ-—

via Finnish piilo

StepLanguageWordMeaning
1Finnishpiilohideout, lair, covert, hiding place; hidden
2Finnishpiilläto be hidden in, lie in; Adessive singular form...
3Proto-Finnicpiildäkto hide, to keep hidden
Every word from Proto-Indo-European h₁elḱ- →Every word from Proto-Germanic ilhilaz →Every word from Proto-Finnic ilkeda →