/ˌniː.əˈlɪs.tɪk/
If you describe someone as nihilistic, you mean they do not trust political and religious authority and place their faith in the individual.
She exhibited none of the narcissistic and nihilistic tendencies of her peers.
她一点儿都没表现出同龄人那种自恋和虚无主义的性格倾向。