Reciprocity is an important concept in international relations.

This artwork is being exhibited in the art gallery.

He went from hither to yon running.

Don't form!

The process of formation is quite complex.

They lined up to perform the celebratory salute on the warship.

Surgery may require an operation.

Surgery is a challenging but rewarding profession.

The pilaf maker made a delicious pilaf.

After the rhinoplasty surgery, the shape of the nose changed.