more serious

"But this affair is more serious even than you know," said Juve.

But the Prefect of Paris has formed a more serious opinion, your Excellency.

That screaming is a more serious matter than at first may seem.

It is no more serious than that, and were she out of the way, he would wake as from a dream.

As to the stranger with the black mustache, that was a more serious matter.

And then, more serious even than before: “Denny, is––is that the only reason, now?”

In later lists, books of a more serious sort will be included.

Of course, his wound had been more serious than he would admit.

I think that we have more serious things to think of than masquerading.

If I have ever trifled with my subject, it was a more serious fault.