The contrast of light and dark in his work is beautiful.

The neighbourhood bully is picking on the local kids again.

This piece of art has perfect symmetry.

In set theory, the symmetric difference indicates the difference between two sets.

My reaction to his opinion was calm.

He learned a new way to cope with stress.

He knows how to deal with that problem.

He remembered something funny and let out a guffaw.

He guffawed after hearing a funny joke.

The freezing point of water is zero degrees.