Where does “jakóż” come from?

jakóż (Slovincian) comes from Polish -ż, from Proto-Slavic že, from Proto-Balto-Slavic ge, from Proto-Indo-European ǵʰe — Postpositional intensifying particle: indeed, at any rate, in fact.

Ancestry of “jakóż”, step by step

StepLanguageWordMeaning
1Polish-żappended to create an emphatic form
2Proto-Slavicžeso that, since; "emphatic enclitic"
3Proto-Balto-Slavicge—
4Proto-Indo-EuropeanǵʰePostpositional intensifying particle: indeed, at any rate, in fact
Every word from Proto-Indo-European ǵʰe →Every word from Polish -ż →Every word from Proto-Balto-Slavic ge →