Where does “väärinpäin” come from?

väärinpäin (Finnish) comes from Finnish väärin, from Finnish väärä, from Old Swedish fahra, from Middle Low German vāre, from Old Saxon fāra, from Proto-Germanic fērō, from Proto-Indo-European per-, from Proto-Indo-European pr̥tós — passed , crossed.

Ancestry of “väärinpäin”, step by step

väärinpäin traces back through two separate lines of ancestry.

via Finnish väärin

StepLanguageWordMeaning
1Finnishväärinwrongly; Only used in olla väärin; Instructive...
2Finnishvääräwrong, incorrect; false, erroneous; crooked,...
3Old Swedishfahra
4Middle Low Germanvāredanger, persecution, fear
5Old Saxonfāra
6Proto-Germanicfērōdanger
7Proto-Indo-Europeanper-before, in front; first; to go through
8Proto-Indo-Europeanpr̥tóspassed , crossed

via Finnish päin

StepLanguageWordMeaning
1Finnishpäinagainst, to, on etc; Used to indicate approximate...
2Finnishpäähead; end, tip
3Proto-Finnicpäähead
4Proto-Uralicpäŋehead
Every word from Proto-Indo-European pr̥tósEvery word from Proto-Indo-European per-Every word from Proto-Germanic fērō
väärinpäin — Etymology, Origin & Word History | Etymology Explorer