there is a theme of betrayall in othello,in your own words describe how shakespeare potrayed this theme and give examples from the text?

In 'Othello' the central theme is jealousy and betrayal.
Iago inspires jealousy in several of the central characters, most notably, Roderigo and
Othello.

Iago sets in place malice in Roderigo towards
Othello for marrying Desdemona but what Roderigo does not realise is that he is being
duped by Iago who not only has no intention to promote Roderigo to Desdemona but is also
milking Roderigo for every penny that he is
worth.

Iago plants seeds of doubt about
Desdemona's faithfulness to Othello informing him that she has been unfaithful to him
with Cassio and as a result he murders her and asks Iago to kill Cassio on his
behalf.

Eventually, all parties come to realise
that Iago has betrayed them all.

He betrays Othello by
lying about Cassio and Desdemona

He betrays Roderigo by
lying about Cassio and Desdemona and subsequently killing
him.

He betrays his wife by killing her when she exposes
him.

He betrayed Desdemona by lying about her
virtue.

He betrays Cassio by engineering his
demotion.

Othello is not
innocent:

He also betrays
Desdemona

He betrays
Cassio

and to a certain extent he betrays himself by
succumbing to jealousy and fulfilling the expectations that Venetian society had of him
based on race.

He also betrays the audeince because in the
final Act when we think he is going to come clean and explain his actions he does the
opposite and decides to remain silent.

If you are looking
for key quotations, Act 3 Scene 3 is the central scene and marks the turning point of
the play. In this scene, there are several quotations that relate to jealousy and
describe it as being a poison or disease. In terms of betrayal the final Act provides
several good examples of how Othello copes with the realisation of his betrayal of
Desdemona.