They might insult you, threaten violence, yell, or lie to make themselves look better. Be mentally prepared for a strong reaction and remember to stay calm and diplomatic. Don't yell or threaten them back and put physical distance between you if you feel unsafe.
The narcissist perceives every disagreement - let alone criticism - as nothing short of a threat. He reacts defensively. He becomes indignant, aggressive and cold. He detaches emotionally for fear of yet another (narcissistic) injury.
In narcissists' efforts to avoid blame, they often combine several fake apologies at once, such as, “I am sorry if I said anything to offend you, but I have strong opinions. Maybe you're too sensitive,” or, “I guess I should tell you I am sorry. But you know I would never deliberately hurt you.
Rage: Narcissists are insecure and when there is a narcissistic injury to their sense of self, they will rage. This is often done with yelling and insults hurled at the victim. During these rages, the narcissist can be the most damaging in their words.
Grandiosity is the defining characteristic of narcissism. More than just arrogance or vanity, grandiosity is an unrealistic sense of superiority. Narcissists believe they are unique or “special” and can only be understood by other special people.
The narcissist tries to ignore it, talk it out of existence, or belittle its importance. If this crude mechanism of cognitive dissonance fails, the narcissist resorts to denial and repression of the humiliating material. He "forgets" all about it, gets it out of his mind and, when reminded of it, denies it.
Grooming a person, manipulating her into doubting her feelings, generating shame regarding her best qualities, and manipulatively creating dependency are four ways a narcissist destroys a person from the inside out.
Apologize. If you've heard someone say, “Narcissists never apologize,” they're not exactly right. While many traits of narcissism like entitlement, elitism, and arrogance make it unlikely someone with narcissistic traits will go the apology route, apologies are sometimes used with ulterior motives.
To narcissists, spending large amounts of money on others can be a way to get people to like them. They may be stingy in private, for example, but cover dinner for colleagues or give gifts just for show.
They talk a good game, but narcissists actually have very low self-esteem. Low self-worth/confidence/esteem is at the core of a narcissism. This low sense of self naturally makes it extremely easy for them to become jealous – very jealous.