Translation of "Entendement" in English

Son idée dépasse mon entendement.

His idea is beyond the reach of my understanding.

La théorie de l'évolution dépasse mon entendement.

The theory of evolution is beyond the reach of my imagination.

Aie le courage de faire usage de ton propre entendement.

Have the courage to use your own reason.

- Je crains que le livre dépasse sa capacité de compréhension.
- Je crains que le livre ne dépasse son entendement.

I'm afraid the book is beyond the reach of his understanding.