The star implodes and becomes a black hole.

He was suffering from muscle contractions due to pain.

His leg suddenly underwent a spasm.

In this chemical reaction, condensation occurs.

Because the wind became strong, the captain ordered to reef the sail.

He made a reduced copy of the map.

This reduced copy is missing the details of the original.

He exercises every day to strengthen his sartorius muscle.

He decided to undergo sex reassignment surgery.

My younger brother had an appendectomy yesterday.