Rancour

In the age of social media, one dissatisfied customer's hissy fit can soon create a major public relations crisis for a manufacturer. By promptly addressing the customer's complaint in a personal way and without rancour, the company may actually turn the situation in its favour.

"Thou know'st, who oft hast sorrowed with my pain, / how, tost by Juno's rancour, o'er the main / thy brother wanders."