He would never get anyone else to understand his concerns.

In any case, I could not understand his concern with the child.

I can understand their concerns - they are natural and human.

She looked, too, for a moment not understanding his concern.

It was good to sit down, though she could not understand the girl's concern with her feet.

"I understand your concerns, but somebody has to take a chance here."

Perhaps he has young kids of his own, and would have understood your concern.

Another threat to add to the rest, but he could understand her concern.

However we understand your general concern and will bear it in mind for the future.

"I understand your concerns, and hope we can continue this conversation another time."