Stoicism (noun)

1. The philosophy or attitude of accepting pain or hardship without showing emotion.
2. The ancient Greek philosophy that held the belief that individuals should be free from passion and remain indifferent to pleasure and pain.

Origin:

From stoic + -ism.

Examples:

1. He practiced stoicism in order to deal with the stress of his job.
2. The Stoics believed that the path to happiness was through the practice of stoicism.
3. The stoicism of the soldiers helped them to endure the hardships of battle.
4. He was admired for his stoicism, which helped him to remain calm under pressure.
5. Stoicism was a popular philosophy among the ancient Greeks.