longanimity

/ˌlɔŋɡəˈnɪməti/
noun
  1. The quality of being patient and able to endure hardship or suffering without complaining.
    • She faced the long illness with remarkable longanimity.
    • The teacher's longanimity helped her handle the noisy classroom calmly.
    • His longanimity in dealing with difficult customers earned him respect.
Antonyms