[yán zhòng jiǔ dǐng]   

言    重    九    鼎    形容说话有分量，比较比来九鼎也不算重。

言重九鼎是汉语词汇，读音是yán zhòng jiǔ dǐng，解释为说话有分量。

One's word carries the weight of nine tripods

言者不知    言不及义    言近指远    言之不预    言语道断