Where does “toż” come from?

toż (Old Polish) comes from Old Polish to, from Old Polish li, from Proto-Slavic li — question-forming interrogative particle.

Ancestry of “toż”, step by step

StepLanguageWordMeaning
1Old Polishtointensifying particle
2Old Polishliinterrogative particle: introduces a yes-no question
3Proto-Slavicliquestion-forming interrogative particle
Every word from Proto-Slavic li →Every word from Old Polish li →Every word from Old Polish to →