Subside (verb)

1. To settle or sink to a lower or a settled position.
2. To decrease in intensity or severity, or to become calm.
3. To become less active, to die down.

Origin:

Late 16th century (in the sense "sink to the bottom"): from latin subsidēre, from sub- "under" + sidēre "to sit".

Examples:

1. The swelling on my leg eventually subsided.
2. The storm gradually subsided and the sea became calm.
3. The riots subsided after the government announced a series of reforms.
4. His anger subsided and he was able to continue the conversation calmly.
5. The pain in his head subsided after he took some medicine.