The most worrisome are those that quickly and easily trade genetic material across species.

But it's his approach at the plate that was most worrisome.

The potential loss of large financial companies is most worrisome to downtown and to city officials.

The most worrisome was still what he might have said in his delirium.

Start the morning, afternoon, or evening with the most worrisome task before you.

He kept coming back to that thought; it was the most worrisome prospect.

Perhaps its most worrisome finding was a sense of pessimism in the state.

Getting the line through the camp was the hardest, most worrisome part.

That is the most worrisome issue in the world today.

Some of the claims the Court decided to permit today are among the most worrisome to the industry.