It's become increasingly difficult to find places with the proper size and other characteristics.

I don't have proper places to run.

You can make life a little more difficult for somebody here than other places. If you keep them behind, you can make life miserable for them.

I find it very difficult to relax. I find it increasingly difficult to find outlets for my frustration.

Man's greatness consists in his ability to do and the proper application of his powers to things needed to be done.

This radioactive material was packaged the way it should have been, in the proper equipment, to withstand a whole lot more than what it took last night.