Where does “synobójczyni” come from?

synobójczyni (Polish) comes from Polish synobójca, from Polish -ca, from Old Polish -ca, from Proto-Slavic -ьca, from Proto-Slavic -ьka, from Proto-Balto-Slavic -ikaʔ, from Proto-Indo-European -ikeh₂.

Ancestry of “synobójczyni”, step by step

StepLanguageWordMeaning
1Polishsynobójcafilicide
2Polish-caForms agent nouns
3Old Polish-caforms agent nouns
4Proto-Slavic-ьcaDenominal, forms diminutives; Deverbal , forms...
5Proto-Slavic-ьka—
6Proto-Balto-Slavic-ikaʔ—
7Proto-Indo-European-ikeh₂—
Every word from Proto-Indo-European -ikeh₂ →Every word from Polish -ca →Every word from Proto-Slavic -ьka →