If you underrate someone or something, you do not recognize how clever, important, or significant they are.
例句
We women have a lot of good business skills, although we tend to underrate ourselves...我们女性拥有很多出色的商业技巧，只是我们往往会看轻自己。He underrated the seriousness of William's head injury.他低估了威廉头部伤势的严重性。