Because I am very good at math, the complicated nature of calculus is still understandable to me, even though it is not to my classmates.

For a rocket scientist, the nuances of rocket science are easily understandable, even though they are not to normal folk like us.

The language you speak is easily understandable to you, but to someone that speaks a different language it is not.

Nothing is more understandable to a human than human behavior and speech, but animals rarely understand more than what we train them to.

It is understandable for a baby to act like a child, but a full grown adult should never act the same way.