领悟用英语可以说成 "enlightenment" 或 "realization"。"Enlightenment" 来源于拉丁文 "enlighten"，意思是 "使觉悟"。"Realization" 来源于拉丁文 "realize"，意思是 "实现" 或 "领会"。

例句：

After years of study and contemplation, he finally reached enlightenment.

这个项目的实现是我们的领悟。

I had a sudden realization that I had left my keys at home.

我领悟到，我把钥匙丢在家里了。