το δέον γενέσθαι

Learned stereotype expression from Katharevousa.
Singular neuter article τό & neuter present participle δέον (of δέω² “to need”‎) & middle aorist infinitive Ancient Greek γενέσθαι of γίγνομαι (“to become”).

• IPA^(key): /to ˈðeon ʝeˈnesθe/

το δέον γενέσθαι • (to déon genésthai)

1. (Katharevousa) that which must be done

   Ας σκεφτούν οι πολιτικοί το δέον γενέσθαι.

   As skeftoún oi politikoí to déon genésthai.

   The politicians should contemplate (think) on that which must be done.

• τί δέον γενέσθαι (tí déon genésthai, “what should be done?”)