Where does “को” come from?

को (Hindi) comes from Old Hindi काहू, from Sanskrit कक्षे, from Proto-Indo-Aryan káṭṣas, from Proto-Indo-Iranian káćšas, from Proto-Indo-European koḱs- — joint.

को (Hindi): marks the accusative case in certain contexts,...

Definitions

  1. marks the accusative case in certain contexts,...

Ancestry of “को”, step by step

StepLanguageWordMeaning
1Old Hindiकाहू—
2Sanskritकक्षेin the armpit
3Proto-Indo-Aryankáṭṣas—
4Proto-Indo-Iraniankáćšasarmpit
5Proto-Indo-Europeankoḱs-joint
Every word from Proto-Indo-European koḱs- →Every word from Proto-Indo-Iranian káćšas →Every word from Proto-Indo-Aryan káṭṣas →