composure

A state of being calm and unemotional, especially under pressure.

A state of being serene and untroubled.

A state of being completely calm and in control of one's feelings.

In a calm and controlled manner.

To fail to remain calm and show emotion like anger or distress.

To continue to be calm in a difficult situation.

To remain calm and not show one's emotions.

To succeed in staying calm.

To get back one's composure after an emotional upset.

To get back to a calm state after losing it.

To manage to keep one's composure (formal).

To take a moment to become calm and composed.

To become calm after a period of emotional distress.

To disturb someone's calm state.