Meaning of 処する in Japanese

It's the prevention of migraines during daily life that's important, not dealing with migraines when they occur.

He can't cope with difficult situations.

He didn't have enough experience to cope with the problem.

The Japanese government can't cope with the problem.

Japan will need more labor to cope with its declining birthrate.

The doctor knew how to cope with an emergency like this.

The occasion demands a cool head.

Be prompt in dealing with the problem.

What kinds of changes are needed to address these problems?

After weighing all these considerations, the promoters will present their scheme in the form of a private bill; however, they might find themselves forced to alter the route in order to meet criticisms in Parliament.