It is a tragic flaw of a tragic character - e.g. Blanche's hamartia is desire and Hamlet's hamartia is his inability to act
What is a catalyst?
It speeds up events in the play - e.g. Blanche's catalyst could be her desire
What is hubris?
It is excessive arrogance and pride - e.g. Blanche's hubris is her physical appearance
What is Peripeteia?
It is the tragic character's suddenrealisation that everything has gone wrong - e.g. Blanche's realisation that her deception and lies have been revealed
What is Anagnorisis?
A tragic character's sudden epiphany - e.g. Reveal of Blanche's lies and Hamlet's realisation of Claudius' betrayal