Aplomb (noun)

Self-confidence and assurance, especially in difficult situations.

Origin:

From french aplomb, from à ("to") + plomb ("plumb"), from latin plumbum ("lead").

Examples:

1. The young woman approached the podium with aplomb, ready to deliver her speech.
2. The tightrope walker crossed the chasm with aplomb, never once looking down.
3. The actor performed the difficult monologue with aplomb, making it seem effortless.
4. The detective solved the case with aplomb, impressing his colleagues.
5. The pilot landed the plane with aplomb, despite the rough conditions.