Antonyms for "pass oneself off as" include being honest, truthful, authentic, sincere, genuine, and transparent. These words suggest that individuals should not misrepresent themselves, their skills, or their abilities. Honesty is an essential virtue, and people should embrace it to build trust and credibility. Authenticity promotes realness and originality, while sincerity underscores honesty and openness. Being genuine means being honest and truthful, without any fakeness, pretense, or deceit. Transparency, on the other hand, refers to openness, clarity, and straightforwardness. In summary, shunning deceit and embracing authenticity, honesty, and transparency are antonyms for "pass oneself off as.