Where does “íṣṭakaH” come from?

íṣṭakaH (Proto-Indo-Aryan) comes from Proto-Indo-Iranian ištaH — brick.

Ancestry of “íṣṭakaH”, step by step

StepLanguageWordMeaning
1Proto-Indo-IranianištaHbrick
Every word from Proto-Indo-Iranian ištaH