disingenuous
adjective formal uk/ˌdɪs.ɪnˈdʒen.ju.əs/ us/ˌdɪs.ɪnˈdʒen.ju.əs/
（人或其行为）不够诚实的，不够坦白的
(of a person or their behaviour) slightly dishonest, or not speaking the complete truth
It was disingenuous of her to claim she had no financial interest in the case. 她声称自己在这个案子中没有任何经济利益，这有些心口不一。
Opposite: ingenuous