The phrase "offending word" refers to a word or language that bothers or upsets someone because it is disrespectful, hurtful, or inappropriate. Full definition
Absent love, potentially offending words or deeds are more likely to bring about retaliation and sprout rivalries that undermine performance. (entrepreneur.com)
In September, the publisher became aware that Yelp promoted its own «best of» city guides online, and sued when Yelp refused to remove the offending words. (canadianbusiness.com)