τι δέον γενέσθαι

Etymology
Learned stereotype interrogative expression from Katharevousa τί δέον γενέσθαι;, lit. 'what needs to become?'Interrogative pronoun & neuter present participle  (of δέω2 “to need”) & middle aorist infinitive  of.

Phrase

 * 1)  what is to be done?