whither
adv. 到哪里，去哪儿
conj. 无论到何种程度；无论到哪里
例句
They knew not whither they went.
他们不知要去哪里。
《柯林斯英汉双解大词典》
Whither should they go?
他们应往何处去？
《牛津词典》
They did not know whither they should go.
他们不知何去何从。
