* The constant news reports about the war filled her with an inquietude she couldn't shake. (This highlights a feeling of unease or anxiety.)
* His inquietude about the upcoming exam was evident in his fidgeting and inability to focus. (This shows a state of restlessness and worry.)
* Despite the outward calm, an inquietude lingered in her eyes, hinting at unspoken fears. (This uses inquietude to suggest a hidden anxiety.)
Inquietude is a less common word than "anxiety" or "unease," but it can add a more formal or literary tone to your writing.