Simple Sentences:
* The detective stared at the suspect with an unflinching gaze.
* She faced her fears with unflinching courage.
* The general delivered his speech with unflinching conviction.
More Complex Sentences:
* Despite the intense pressure from the media, the politician maintained an unflinching commitment to his principles.
* The artist's unflinching portrayal of the war's horrors shocked and moved the audience.
* Even in the face of overwhelming odds, her unflinching belief in her dream fueled her success.
Figurative Language:
* His unflinching loyalty to his friends was like a rock in a storm.
* Her honesty, an unflinching beacon, shone through all her words.
Remember, "unflinching" usually refers to a firmness of mind or spirit, often in the face of adversity or fear. Choose a sentence that best fits the context of your writing.