At first glance, it appears to be Othello being diplomatic and suggesting that they resolve their issues through speech and not actions. However, here Othello is making a jab at Brabantio's age, saying he could easily beat him. Unusual of a man insecure of his own age. As well as this, given the sword is a phallic shape he is also insinuating as to Brabantio's impotency, a high insult indeed.