pray的派生词

pray派生词为prayer，prayful

例句

1、

He prayed that his barren wife would one day have a child.

他祈祷自己不孕的妻子有朝一日能怀上宝宝。

2、

He spent his time in prison praying and studying

他把狱中的时间都用于祈祷和学习。

3、

What， pray， is the meaning of this?

请问，这是什么意思