Final answer:
In the play Othello by Shakespeare, Iago is referring to Roderigo when he says the line. Iago manipulates Roderigo for his own gain.
Step-by-step explanation:
In the play Othello by William Shakespeare, Iago says the line "Thus do I make my fool my purse." Here, Iago is referring to the character Roderigo. Iago uses Roderigo's foolishness to his advantage by manipulating him and using him as a source of money and resources.
Learn more about Shakespeare's Othello