Othello is stating that he must complete the task of killing his wife by using the motivation of her being unfaithful in order to complete it, but he is hesitant to flat out say that he is going to kill her. He then goes on to say, “Yet I’ll not shed her blood, / Nor scar that whiter skin of hers than snow, /and smooth as monumental alabaster” (ll 3-5). Othello expresses that he doesn’t want to kill her in a way that would make her bleed or scar her because he wouldn’t want to ruin her pretty skin because it would make it look ruined and dirty. In Othello’s eyes she is already ruined and dirty because she has cheated on him, so he wouldn't want to further ruin her.
Othello continues his soliloquy with, “Yet she must die, else she’ll betray more men”(l 6). Iago’s manipulation of Othello has led Othello to believe his new wife was unfaithful to him, and he firmly believes that he must kill her now because he doesn’t want anyone else to be betrayed by her. He then