Combination of the interrogative pronoun ti ‘what’ and the particle na ‘to’ in interrogative sentences of partial ignorance: ta < ti + na (Anagnostou 1903˙ Papadopoulos 1926).
E.g. tétʝus pú-ni, tá tu-gánu?
tétʝos pu-íne, tí-na ton-káno?
‘As he is, what can Ι do with him?’