what are three ways Othello and Iago relate to the power of words

Iago uses words and rhetoric to manipulate people like Othello and Roderigo. Iago knows how to bait these people by using words to capture their emotions. Iago, for example, is quck to use Roderigo's lust for Desdemona to his own advantage:

Thou art sure of me: — go, make money: — I have told thee often, and I re-tell thee again and again, I hearted: rooted in my heart, i.e., deeply and passionately felt. conjunctive: united hate the Moor: my cause is hearted; thine hath no less reason. Let us be conjunctive in our revenge
against him: if thou canst cuckold him, thou dost thyself a pleasure, me a sport.