n.燧石,火石,(打火机等的)打火石
His eyes were as hard as flint.
他的眼神冷酷无情。
Houses in this part of the country are built of flint.
这个国家这一区的房子是用燧石建造的.
Under the pressure, the flint crumbled into fragments.
燧石在压力的作用下碎成了小块。