Peripeteia

Peripeteia /ˌpɛrəpɨˈtaɪ.ə/ (Greek: Περιπέτεια) is a reversal of circumstances, or turning point. The term is primarily used with reference to works of literature. The English form of peripeteia is peripety. Peripety is a sudden reversal dependent on intellect and logic. In modern Greek, περιπέτεια means adventure.

Read more about Peripeteia:  Aristotle's View