Where does “káṭṣas” come from?

káṭṣas (Proto-Indo-Aryan) comes from Proto-Indo-Iranian káćšas, from Proto-Indo-European koḱs- — joint.

Ancestry of “káṭṣas”, step by step

StepLanguageWordMeaning
1Proto-Indo-Iraniankáćšasarmpit
2Proto-Indo-Europeankoḱs-joint

Words derived from “káṭṣas”

Every word from Proto-Indo-European koḱs- →Every word from Proto-Indo-Iranian káćšas →