steadfast ⇒ 我们要坚定地走正确的道路。 Wǒmen yào jiāndìng de zǒu zhèngquè de dàolù. → We must steadfastly keep to the correct path.
坚实
solid
坚强
strong ⇒ 他意志坚强。 Tā yìzhì jiānqiáng. → He is strong-willed.
坚持
go on ⇒ 你应该坚持锻炼身体。 Nǐ yīnggāi jiānchí duànliàn shēntǐ. → You should go on taking exercise. ⇒ 他坚持要我参加。 Tā jiānchí yào wǒ cānjiā. → He insisted that I take part. ⇒ 系主任一向坚持原则。 Xì zhǔrèn yīxiàng jiānchí yuánzé. → The head of department sticks to his principles.