"Are not you a strumpet?"

"No, as I am a Christian.
If to preserve this vessel for my lord
From any other foul unlawful touch
Be not to be a strumpet, I am none."

Desdemona to Othello
Act 4 ii. 182-84
Literary Devices:
Claim: Desdemona is claiming she is not a strumpet and is supporting it with the detail that she is a Christian and has only given herself to her lord. This proves to the reader that Desdemona is faithful although it is not proven to Othello. We believe it adds suspense to the story line because we know Desdemona is faithful but Othello just doesn't seem to get it and we are wanting Othello to understand so order is kept.
Metonymy: Desdemona says "foul unlawful touch" instead of saying sex or sleeping with. As a reader we are not offended by the way it is said and we do not lose sight of the main point which is the order Desdemona is trying to bring back.
Pre-empting: Desdemona is anticipating that Othello is going to say she laid with another man, so she brought it up saying it is not true in an attempt to invalidate it. Shows order never left Desdemona, she was always faithful.