taciturn
adj. 沉默寡言的;无言的,不太说话的
例句
He became a taciturn man, a man not easy to live with. Later, when the older children married and had children of their own, he mellowed a little.
他变成了一个沉默寡言的人、一个不容易相处的人。后来,等大点的孩子们结了婚,也有了他们自己的孩子,他变得平和了些。
《柯林斯英汉双解大词典》