engage in 是动词词性。

作动词使用意思是参与;参加；从事；忙于;

例句

He said the United States was not willing to engage in a search for partial solutions — to succumb, as he put it, to a siren song.

他说美国不愿意参与仅仅解决部分问题的方案的探索——按照他的说法，这种做法就是向诱惑低头。