πός
πός
who, Pron., traced in the interrog. forms, ποῦ,ποῖ, πῆ, πῶς, πω, πόθι, πόθεν, πότε, πότερος, πόστος,ποῖος, πόσος, to each of which there is a correspondingenclitic form, που, ποι, πη, πως, etc.;—in these forms π in Ionic Gr. is represented by κ, as κοῦ, κοῖ, etc.