Where does “कईल” come from?
कईल (Bhojpuri) comes from Sanskrit करोति, from Sanskrit कृणोति, from Proto-Indo-Aryan kr̥náwti, from Proto-Indo-Iranian kr̥náwti, from Proto-Indo-European kʷr̥-néw-ti ~ kʷr̥-nw-énti, from Proto-Indo-European kʷer- — to do; to make; to build.
कईल (Bhojpuri): to do; an auxiliary verb
Ancestry of “कईल”, step by step